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Some books are difficult to recommend “similar books” for because the thing readers loved was never a single trope.
Sicko by Amo Jones is one of them.
Yes, Royce is a biker. Yes, the Wolf Pack MC matters. But replacing Royce with fifteen random motorcycle-club heroes completely misses why Sicko sticks with readers.
The real combination is stranger and darker:
A boy who once belonged to Jade’s family disappears. He returns as somebody harder. Their history makes wanting each other feel forbidden before the criminal plot even starts. Protection becomes tangled with violence. Trauma changes how both characters love. The book keeps escalating until romance, betrayal, family, sex, criminal danger, and survival are almost impossible to separate.
That means the best books like Sicko are not necessarily the books with the most motorcycles.
They are the books that recreate the particular kind of emotional instability that Sicko delivers.
Below, I’ve separated the closest matches from the books that only reproduce one piece of the experience, because a foster-brother romance and a gritty MC romance may both appeal to Sicko readers for completely different reasons.
How these books are rated: Spice is scored from 1–5. Darkness, obsession, psychological intensity, violence, emotional damage, trigger intensity, romance focus, and overall recommendation are scored from 1–10. Ratings reflect content intensity, not literary quality. Read our complete Dark Romance Rating Methodology for detailed definitions.
Important: Trigger warnings below identify major content themes rather than every potentially upsetting scene. Extremely dark books can contain additional material, so sensitive readers should always check the author’s current content warnings before starting.
The Short Answer: What Should You Read After Sicko?
If you want the closest overall match, start with Malice by Brooklyn Cross.
If the foster-sibling history and toxic reunion mattered more than the MC setting, read Better When It Hurts by Skye Warren.
If you want another forbidden pseudo-sibling relationship with an obsessive, destructive MMC, choose Green Light by Jescie Hall.
If you mainly want dangerous bikers, club violence, criminal loyalty, and intimidating men, start with Trigger by J.L. Drake or Lethal by Cassandra Robbins.
And if what you really want is the older-school, ugly, emotionally chaotic side of biker romance—the kind where nobody behaves like a perfectly packaged BookTok boyfriend—try Undeniable by Madeline Sheehan.
That distinction matters. A reader chasing Royce specifically is looking for something very different from a reader chasing the Wolf Pack.
Why Sicko Is Harder to Match Than It Looks
Sicko begins with an unusually powerful emotional setup: Royce was Jade’s foster brother and protector before disappearing from her life. When he returns, he is no longer simply Royce. He has become Sicko, vice president of the Wolf Pack MC.
That creates four different recommendation paths:
Forbidden-history readers want someone the heroine should not want—but already knows too intimately.
Transformation readers want the MMC who disappears and returns harder, crueler, more dangerous, or emotionally unreachable.
MC readers want the criminal brotherhood, club hierarchy, violence, loyalty, retaliation, and “touch her and die” atmosphere.
Trauma readers want the relationship complicated by genuinely disturbing external events rather than darkness existing only because the hero stalks or bullies the heroine.
The best recommendations below hit at least two of those categories. The strongest hit three or four.
1. Malice by Brooklyn Cross
If I had to pick one overlooked book that most naturally belongs on a Sicko recommendation list, it would be Malice.
Kaivan and Raine were foster siblings and childhood best friends before everything shattered. Kai spends ten years in prison for a crime he did not commit and emerges hardened, furious, and intent on revenge against the girl he believes destroyed his life. The story also moves directly through a dark MC world and includes severe trauma, violence, and complicated sexual relationships. Malice is the first book in the Lost Souls MC series and is an MMFM romance rather than a conventional MF romance.
Why readers love it
The resemblance to Sicko goes beyond motorcycles.
You get foster-family history, separation, an MMC radically altered by what happened while they were apart, resentment sitting on top of old attachment, violent MC culture, sexual intensity, and two damaged people carrying very different versions of the past.
What makes it different
This is why choose/MMFM, with additional romantic relationships surrounding Raine. It also pushes harder into revenge and imprisonment than Sicko does.
Eerie verdict
This is the recommendation I would put in front of the reader who says:
“No. I don’t just want another biker. I want the messed-up HISTORY.”
That is where Malice earns its place.
Who should read it
Readers who want the foster-sibling element, traumatic reunion, revenge, obsessive men, high spice, MC danger, and emotionally wrecked characters.
Who should avoid it
Readers who only want MF romance, dislike why-choose dynamics, cannot tolerate on-page sexual violence, or want a neat standalone ending.
Spice: 5/5
Darkness: 9/10
Obsession: 9/10
Psychological Intensity: 9/10
Violence: 9/10
Emotional Damage: 10/10
Trigger Intensity: 10/10
Romance Focus: 8/10
Overall Recommendation: 9.5/10
Trigger warnings: Sexual assault, rape, physical violence, trauma, stalking, imprisonment, revenge themes, dub/noncon elements.
Best for readers who liked: Jade and Royce’s foster-family history, the separation, the changed MMC, and Sicko at its messiest.
2. Better When It Hurts by Skye Warren
This is the book I would recommend when someone says the MC itself was secondary and the forbidden history was everything.
Blue and Lola once lived under the same roof as foster siblings. Years later, they reunite with enormous resentment between them, and Blue wants revenge for what he believes she did to him. Publisher material describes Better When It Hurts as a dark adult romance and confirms it can be read as a standalone despite belonging to the Stripped series.
Why readers love it
The emotional engine feels very Sicko: familiarity has curdled into hostility without actually killing the underlying attachment.
There is history before page one.
That matters.
You are not watching two strangers manufacture obsession in three chapters. You are watching two people discover that whatever happened between them never actually ended.
What makes it different
No motorcycle club.
The scale is smaller and more intimate. Instead of trafficking plots and sprawling criminal conspiracies, the darkness sits primarily inside Blue and Lola’s shared past.
Eerie verdict
One of the strongest recommendations here despite lacking bikers.
That sounds contradictory until you understand that Sicko works because Jade remembers Royce before Sicko existed.
Better When It Hurts understands that same emotional trick: the frightening man in front of her is inseparable from the boy she knew.
Who should read it
Readers chasing foster-sibling taboo, second-chance toxicity, revenge, sexual tension, cruel MMC behavior, and emotional history.
Who should avoid it
Readers specifically wanting an MC plot, sprawling suspense, or a protective hero who is consistently gentle with the heroine.
Spice: 4/5
Darkness: 7/10
Obsession: 8/10
Psychological Intensity: 8/10
Violence: 5/10
Emotional Damage: 9/10
Trigger Intensity: 8/10
Romance Focus: 9/10
Overall Recommendation: 9/10
Trigger warnings: Abuse, revenge, toxic relationship dynamics, trauma, sexual content, violence.
Best for readers who liked: the foster-sibling taboo and painful preexisting history in Sicko more than its MC plot.
3. Green Light by Jescie Hall
Green Light is what I would give the reader who wants the taboo relationship in Sicko turned even more antagonistic.
Shane becomes obsessed online with Montana before discovering she is his new stepsister. Their relationship is built on deception, anger, obsession, retaliation, trauma, and attraction rather than anything resembling healthy courtship. The book is explicitly marketed as a dark college romance involving an online obsession with a stepsister.
Why readers love it
Shane and Montana do not gently overcome the awkwardness of becoming stepsiblings.
They weaponize it.
The attraction feels forbidden, but the bigger appeal is how spectacularly toxic both characters can become.
What makes it different
This is digital obsession, revenge, college-age chaos, and a murder-mystery thread rather than a traditional motorcycle-club story.
Eerie verdict
Choose this when the “we absolutely should not want each other” part of Sicko mattered more than leather cuts and club hierarchy.
It also works especially well for readers who enjoy MMCs whose fixation and hostility are essentially two expressions of the same emotion.
Who should read it
Readers who enjoy stepsibling taboo, revenge, forced proximity, hate-driven chemistry, possessive men, and morally ugly relationships.
Who should avoid it
Readers sensitive to cheating, dubious/non-consensual sexual situations, bullying, degradation, drugging, or highly toxic relationship behavior.
Spice: 5/5
Darkness: 9/10
Obsession: 10/10
Psychological Intensity: 9/10
Violence: 7/10
Emotional Damage: 9/10
Trigger Intensity: 10/10
Romance Focus: 9/10
Overall Recommendation: 9/10
Trigger warnings: Dubcon/noncon themes, abuse, bullying, drugging, trauma, cheating, degradation, violence, toxic relationship dynamics.
Best for readers who liked: forbidden family-adjacent attraction plus obsession and psychological warfare.
4. Undeniable by Madeline Sheehan
Before dark MC romance became polished into interchangeable tattooed possessive heroes, books like Undeniable were willing to be genuinely ugly.
Eva meets Deuce when she is young because both of their lives are tied to motorcycle clubs. Their connection repeatedly collides with time, other relationships, betrayal, violence, and terrible decisions. Published descriptions characterize the journey as filled with pain, betrayal, and bloodshed.
Why readers love it
This is not a fantasy in which the biker hero’s criminality becomes decorative the instant the romance begins.
The MC world damages people.
The characters damage one another.
Consequences accumulate.
What makes it different
The relationship spans a much longer period and feels more like a destructive life story than Sicko‘s thriller-heavy structure.
Eerie verdict
Read this if your favorite part of Sicko was the sensation that love does not automatically make dangerous people safe.
Skip it if you need modern romance-safety expectations.
Who should read it
Readers who appreciate old-school gritty MC romance, morally compromised relationships, huge emotional swings, and characters who make legitimately infuriating decisions.
Who should avoid it
Readers needing clean relationship boundaries, consistently likable protagonists, or emotionally comforting romance.
Spice: 4/5
Darkness: 9/10
Obsession: 8/10
Psychological Intensity: 8/10
Violence: 9/10
Emotional Damage: 10/10
Trigger Intensity: 10/10
Romance Focus: 9/10
Overall Recommendation: 8.5/10
Trigger warnings: Violence, abuse, betrayal, sexual content, criminal activity, toxic relationship dynamics and other heavy material.
Best for readers who liked: the brutal MC atmosphere of Sicko rather than sanitized biker romance.
5. Trigger by J.L. Drake
Trigger was raised through severe abuse and becomes the president of Devil’s Reach MC—a man defined by violence, emotional isolation, and an inability to tolerate touch. Tess arrives carrying her own history and ends up inside his club’s orbit. The book is explicitly marketed as a dark, violent, gritty MC romance and is Book One of a trilogy.
Why readers love it
The hero feels created by violence rather than merely accessorized with it.
That is an important distinction for Sicko readers.
Royce becoming Sicko matters because the man Jade remembers is not exactly the man who returns. Trigger delivers a similar fascination with what trauma can turn a man into.
What makes it different
The forbidden foster-sibling relationship is gone. This recommendation is about the damaged biker hero, criminal danger, and emotional penetration of a man who has made himself unreachable.
Eerie verdict
One of the better “you loved Sicko himself” recommendations.
Not Royce.
Sicko.
Who should read it
Readers who want an exceptionally damaged MC president, dangerous club politics, violence, suspense, and a heroine entering a frightening masculine world.
Who should avoid it
Readers who dislike series commitments or cliffhanger-style continuation.
Spice: 4/5
Darkness: 8/10
Obsession: 8/10
Psychological Intensity: 9/10
Violence: 9/10
Emotional Damage: 9/10
Trigger Intensity: 9/10
Romance Focus: 8/10
Overall Recommendation: 9/10
Trigger warnings: Childhood abuse, violence, murder, trauma, criminal activity, psychological distress.
Best for readers who liked: Royce’s transformation into a violent MC figure.
6. Lethal by Cassandra Robbins
Blade McCormick is president of the Disciples MC. Eve is connected to the club through her brother’s debt—a debt serious enough that she becomes part of what is owed. The author’s own site identifies Lethal as the beginning of the Disciples MC series.
Why readers love it
Blade brings the intimidating club-president energy without becoming a carbon copy of Royce.
Eve’s vulnerability also comes from being drawn into a world where male loyalty, violence, debt, and ownership have rules she did not write.
What makes it different
This is not a childhood-history romance. The danger comes from the heroine’s entry into the MC world rather than reconnecting with somebody she once considered family.
Eerie verdict
Less psychologically strange than Sicko, but stronger than many generic MC recommendations because the club actually creates the romantic conflict.
Who should read it
Readers craving possession, biker hierarchy, criminal threats, power imbalance, and alpha MC leadership.
Who should avoid it
Readers whose favorite Sicko element was exclusively the pseudo-sibling taboo.
Spice: 4/5
Darkness: 8/10
Obsession: 8/10
Psychological Intensity: 7/10
Violence: 8/10
Emotional Damage: 7/10
Trigger Intensity: 8/10
Romance Focus: 9/10
Overall Recommendation: 8.5/10
Trigger warnings: Violence, debt coercion, criminal activity, threats, controlling behavior.
Best for readers who liked: the dangerous MC setting and possessive male power in Sicko.
7. Property of Drex by C.M. Owens
Even the title tells you what kind of world you are entering.
Property of Drex begins the four-book Death Chasers MC series and places desperation, sacrifice, ownership, and dangerous bikers directly at the center of the plot.
Why readers love it
It delivers the feeling that the heroine has crossed into a society operating according to completely different moral rules.
That claustrophobic sense of entering a dangerous male world is one of the reasons Sicko works so well.
What makes it different
It leans harder into the possession/debt side of MC romance and less into forbidden childhood attachment.
Eerie verdict
Read this for the “these people do not live by normal laws” sensation.
That is a more useful similarity to Sicko than simply saying, “Both heroes own motorcycles.”
Who should read it
Readers who like dangerous clubs, morally gray protection, possession themes, criminal bargains, and high-stakes loyalty.
Who should avoid it
Readers uncomfortable with ownership language, coercive premises, or aggressive power imbalance.
Spice: 4/5
Darkness: 8/10
Obsession: 8/10
Psychological Intensity: 7/10
Violence: 8/10
Emotional Damage: 8/10
Trigger Intensity: 9/10
Romance Focus: 8/10
Overall Recommendation: 8.5/10
Trigger warnings: Coercive circumstances, violence, criminal activity, threats, sexual content, power imbalance.
Best for readers who liked: the criminal-underworld side of Sicko.
8. Where We Ended by Ashley Munoz
Silas and the heroine in Where We Ended have already spent years trapped in distance and unresolved attachment when the story begins. She has been traded to another motorcycle club; he has watched and protected her from afar, and their chance at finally reaching one another becomes threatened by returning enemies. It is Book Four in the Stone Riders MC series.
Why readers love it
The line connecting this to Sicko is distance without emotional severance.
Royce leaving does not erase Jade.
Silas’s separation similarly fails to extinguish what exists between them.
What makes it different
The romance is less taboo, and the emotional register leans more toward yearning than psychological warfare.
Eerie verdict
A surprisingly effective pick for readers whose favorite trope is:
“He wasn’t beside her, but he never actually stopped watching over her.”
Who should read it
Readers who like long-held devotion, protective bikers, separation, yearning, enemies, and MC politics.
Who should avoid it
Readers seeking maximum taboo or a pitch-black relationship.
Spice: 4/5
Darkness: 7/10
Obsession: 8/10
Psychological Intensity: 7/10
Violence: 7/10
Emotional Damage: 8/10
Trigger Intensity: 7/10
Romance Focus: 9/10
Overall Recommendation: 8.5/10
Trigger warnings: Violence, criminal MC activity, trauma, threats, separation.
Best for readers who liked: Royce’s enduring attachment and protective obsession.
9. Nyx by Serena Akeroyd
Nyx is an enforcer for the Satan’s Sinners, a one-percenter motorcycle club. Even men inside the club fear him. Giulia, however, remembers a different version of him from her childhood. Published descriptions specifically frame the book as dark biker romance involving violence, bloodletting, illegal enterprises, and the contrast between the frightening man Nyx is now and the man Giulia once knew.
Why readers love it
Here is another recommendation built around dual identity through memory.
Everyone else sees the dangerous enforcer.
Giulia remembers the man attached to her past.
That is extremely useful for Sicko readers because Jade’s emotional access to Royce is precisely what complicates her relationship with Sicko.
What makes it different
No foster-sibling taboo.
Instead, the shared past supplies emotional intimacy.
Eerie verdict
One of the better hidden matches on this list.
The similarity isn’t just “biker.”
It is hero of her past versus monster everyone sees now.
Who should read it
Readers wanting one-percenter MC darkness, childhood connection, intimidating heroes, violence, and heavy club culture.
Who should avoid it
Readers wanting the forbidden-family angle specifically.
Spice: 4/5
Darkness: 8/10
Obsession: 8/10
Psychological Intensity: 8/10
Violence: 9/10
Emotional Damage: 8/10
Trigger Intensity: 9/10
Romance Focus: 8/10
Overall Recommendation: 9/10
Trigger warnings: Violence, blood, criminal activity, trauma, sexual content.
Best for readers who liked: knowing the dangerous MMC before he became dangerous.
10. Kings of Mayhem by Penny Dee
Cade has loved Indy for most of his life, but their history is broken before the adult romance ever has a chance to become simple. Kings of Mayhem begins Penny Dee’s Kings of Mayhem MC series and combines long-standing attachment with the biker environment.
Why readers love it
This is the option for readers who loved knowing that Royce and Jade’s connection existed long before the darkest events of Sicko.
History makes every later interaction heavier.
What makes it different
It is considerably less disturbing.
You still get MC culture, broken history, possession, and emotional intensity, but it should not be mistaken for a pitch-black substitute for Sicko.
Eerie verdict
Think of this as a recovery read for someone who still wants bikes and history but needs the darkness dial moved down two notches.
Who should read it
Readers who want childhood attachment, second-chance emotion, biker culture, and a hero who has never really moved on.
Who should avoid it
Readers specifically chasing trafficking-level darkness or extreme psychological taboo.
Spice: 4/5
Darkness: 6/10
Obsession: 8/10
Psychological Intensity: 6/10
Violence: 7/10
Emotional Damage: 8/10
Trigger Intensity: 7/10
Romance Focus: 9/10
Overall Recommendation: 8/10
Trigger warnings: Violence, MC criminal activity, betrayal, emotional trauma.
Best for readers who liked: the “we have always belonged to each other” part of Sicko.
11. Lock & Key by Cat Porter
Cat Porter’s Lock & Key launches a motorcycle-club saga described by the author as gritty, emotional, steamy, action-packed, and centered on loyalty and moving forward from the past.
Why readers love it
This is an MC romance where the world around the couple feels lived in.
The relationships between club members, family, loyalty, grief, history, and romance matter.
What makes it different
It is more reflective and emotionally mature than Sicko.
Do not expect Amo Jones-style plot escalation every fifty pages.
Eerie verdict
Choose this if you want MC atmosphere with emotional weight, not simply an alphahole wearing a cut.
Who should read it
Readers who value second chances, adult characters with pasts, loyalty, found family, suspense, and biker-world immersion.
Who should avoid it
Readers who want obsessive pseudo-incest or constant shock-value twists.
Spice: 4/5
Darkness: 7/10
Obsession: 7/10
Psychological Intensity: 7/10
Violence: 7/10
Emotional Damage: 9/10
Trigger Intensity: 7/10
Romance Focus: 9/10
Overall Recommendation: 8/10
Trigger warnings: Violence, grief, criminal activity, trauma, sexual content.
Best for readers who liked: the loyalty and family complications surrounding Sicko.
12. Reaper’s Stand by Joanna Wylde
Reaper’s Stand follows Reese “Picnic” Hayes, president of the Reapers MC, and London Armstrong. It is the fourth Reapers Motorcycle Club novel and intentionally focuses on mature protagonists rather than repeating the coming-of-age structure of earlier books in the series.
Why readers love it
Picnic feels like a man who genuinely belongs in his criminal world.
The club is not set dressing.
His position creates obligations, risks, and moral compromises.
What makes it different
The protagonists are older and the relationship is less tabloid-chaotic than Jade and Royce’s.
Eerie verdict
Not the closest plot match.
A very good world match.
If what you wanted after Sicko was a convincing MC leader instead of a generic contemporary hero who happens to ride a motorcycle, put this on the list.
Who should read it
Readers who want serious club involvement, mature protagonists, an experienced MMC, danger, loyalty, and high-stakes romantic suspense.
Who should avoid it
Readers wanting pseudo-sibling taboo or youthful emotional volatility.
Spice: 4/5
Darkness: 7/10
Obsession: 7/10
Psychological Intensity: 7/10
Violence: 8/10
Emotional Damage: 7/10
Trigger Intensity: 8/10
Romance Focus: 8/10
Overall Recommendation: 8/10
Trigger warnings: MC violence, criminal activity, threats, sexual content and dangerous situations.
Best for readers who liked: the Wolf Pack’s criminal MC environment.
13. Devil’s Game by Joanna Wylde
Devil’s Game is Book Three of the Reapers MC series.
This is another recommendation where the club conflict itself matters rather than existing as a costume around the romance.
Why readers love it
Danger and romantic attraction exist inside competing loyalties.
That makes choosing somebody emotionally expensive.
What makes it different
The forbidden tension comes from MC allegiances rather than foster-family history.
Eerie verdict
Read this if what you liked in Sicko was the realization that loving someone inside a criminal organization means inheriting enemies you didn’t choose.
Who should read it
Readers who enjoy club rivalries, dangerous loyalties, bikers, romantic suspense, and forbidden attraction created by opposing sides.
Who should avoid it
Readers who need the relationship itself to be the darkest element.
Spice: 4/5
Darkness: 7/10
Obsession: 7/10
Psychological Intensity: 7/10
Violence: 8/10
Emotional Damage: 7/10
Trigger Intensity: 8/10
Romance Focus: 8/10
Overall Recommendation: 8/10
Trigger warnings: Violence, criminal activity, threats, kidnapping/danger themes, sexual content.
Best for readers who liked: the way romance and criminal allegiance collide in Sicko.
14. Motorcycle Man by Kristen Ashley
Motorcycle Man is the fourth Dream Man novel and one of the established modern biker romances that helped define the possessive MC-hero experience for later readers.
Why readers love it
The hero brings big personality, possessiveness, club power, and an intensely masculine world surrounding the romance.
What makes it different
This is much less psychologically extreme than Sicko.
There is no reason to pretend otherwise.
Eerie verdict
It belongs here only for the reader who finished Sicko and thought, “Give me more dominant bikers,” not the reader who thought, “Give me another emotionally horrifying foster-brother situation.”
That distinction saves people from the wrong recommendation.
Who should read it
Readers who want a commanding biker hero, MC culture, possessiveness, and strong romantic focus.
Who should avoid it
Readers searching for extreme taboo, psychological horror, or the darkest possible content.
Spice: 4/5
Darkness: 5/10
Obsession: 7/10
Psychological Intensity: 5/10
Violence: 6/10
Emotional Damage: 6/10
Trigger Intensity: 6/10
Romance Focus: 9/10
Overall Recommendation: 7.5/10
Trigger warnings: Violence, controlling behavior, criminal/MC themes, sexual content.
Best for readers who liked: Sicko as a biker hero rather than Sicko as a dark psychological story.
15. Hell’s Knights by Bella Jewel
Hell’s Knights opens Bella Jewel’s MC Sinners series and is explicitly categorized as an adult modern biker romance.
Why readers love it
The appeal is straightforward: bikers, claiming energy, club culture, danger, and a relationship developing inside a rough-edged world.
What makes it different
This is considerably more traditional than Sicko.
It does not replicate the foster-sibling taboo or Sicko’s extreme accumulation of dark plot elements.
Eerie verdict
A worthwhile genre-root recommendation, not a true Sicko twin.
I would rather explain that honestly than inflate the similarity just to fill slot fifteen.
Who should read it
Readers exploring MC romance after discovering the subgenre through Sicko.
Who should avoid it
Readers who only want pitch-black contemporary romance and extreme taboo.
Spice: 4/5
Darkness: 6/10
Obsession: 7/10
Psychological Intensity: 6/10
Violence: 7/10
Emotional Damage: 7/10
Trigger Intensity: 7/10
Romance Focus: 9/10
Overall Recommendation: 7.5/10
Trigger warnings: Violence, adult sexual content, criminal MC activity, controlling behavior.
Best for readers who liked: the biker-romance foundation underneath Sicko.
Darkness Ranking: From Most Disturbing to Least
| Book | Darkness |
|---|---|
| Malice | 9/10 |
| Green Light | 9/10 |
| Undeniable | 9/10 |
| Trigger | 8/10 |
| Lethal | 8/10 |
| Property of Drex | 8/10 |
| Nyx | 8/10 |
| Better When It Hurts | 7/10 |
| Where We Ended | 7/10 |
| Lock & Key | 7/10 |
| Reaper’s Stand | 7/10 |
| Devil’s Game | 7/10 |
| Kings of Mayhem | 6/10 |
| Hell’s Knights | 6/10 |
| Motorcycle Man | 5/10 |
One thing worth noticing: darkness and emotional damage are not interchangeable.
Better When It Hurts, for example, does not need the same volume of criminal violence as Malice to hurt. Its darkness comes from shared history, resentment, betrayal, and the uncomfortable intimacy of knowing exactly where the other person’s weak points are.
That is why a single “darkness rating” is never enough on its own.
Spice Ranking
| Book | Spice |
|---|---|
| Malice | 5/5 |
| Green Light | 5/5 |
| Better When It Hurts | 4/5 |
| Undeniable | 4/5 |
| Trigger | 4/5 |
| Lethal | 4/5 |
| Property of Drex | 4/5 |
| Where We Ended | 4/5 |
| Nyx | 4/5 |
| Kings of Mayhem | 4/5 |
| Lock & Key | 4/5 |
| Reaper’s Stand | 4/5 |
| Devil’s Game | 4/5 |
| Motorcycle Man | 4/5 |
| Hell’s Knights | 4/5 |
High spice does not automatically mean the relationship is darker.
Green Light and Malice combine high explicitness with genuinely extreme psychological material. Some of the traditional MC romances on the lower half of this list can be equally explicit while presenting a substantially less disturbing relationship.
If you are still figuring out what “4 versus 5 peppers” actually means for Eerie Efficiency, see The Dark Romance Spice Scale: Every Level Explained From Sweet Tension to Completely Unhinged.
Reader Decision Guide
I want the book MOST like Sicko overall
Read Malice.
Foster siblings. Long separation. A man transformed by what happened while they were apart. MC involvement. Revenge. Trauma. Violence. Sexual intensity.
The relationship structure is different, but the ingredient list is almost absurdly compatible.
I want another forbidden sibling-adjacent romance
Read Better When It Hurts if you want shared childhood history.
Read Green Light if you want the relationship nastier, more antagonistic, and more obsessive.
I want a terrifying biker
Read Trigger.
I want the MC world to feel legitimately dangerous
Read Undeniable, Nyx, Property of Drex, or Reaper’s Stand.
I want “he knew her before he became this man”
Read Nyx.
I want “they never really got over each other”
Read Kings of Mayhem or Where We Ended.
I want something dark, but Sicko was almost too much
Try Motorcycle Man or Hell’s Knights before jumping into Malice or Green Light.
I want something WORSE than Sicko emotionally
Start with Malice.
Then reconsider whether you actually wanted that.
If You Loved Book X, Read This Next
If Sicko → Malice
If Malice → Green Light
If Green Light → Better When It Hurts
If Better When It Hurts → Kings of Mayhem
If Lethal → Property of Drex
If Undeniable → Reaper’s Stand
If Motorcycle Man → Hell’s Knights
This is also where reading across Eerie Efficiency’s subgenres becomes useful.
If Sicko made you realize it is obsession rather than motorcycles you actually want, go next to Dark Romance Books With Unhinged Heroes or Dark Romance Books Where He Becomes Obsessed With Her.
If you want something spiritually closer to full psychological chaos, 15 Dark Romance Books Like That Sik Luv is the stronger path.
And if the violence and secrets interested you more than the controlling MMC, try 15 Dark Romance Books Like the Mindf*ck Series.
Books People Think Belong on This List—but Don’t
This is the section most recommendation pages skip.
A book can be excellent dark romance and still be a poor Sicko recommendation.
Haunting Adeline
Readers connect the two because both are dark, sexually explicit, violent, and enormously popular.
But the emotional architecture is different.
Zade’s relationship to Adeline begins in stalking and intrusion. Royce and Jade have an established familial past before the adult darkness begins.
If you are comparing the MMCs themselves rather than searching for the same relationship dynamic, Haunting Adeline vs. God of Malice: Which MMC Is More Unhinged? is more useful.
God of Malice
Again: excellent answer to “give me an unhinged MMC.”
Weak answer to “give me Sicko again.”
The setting, relationship history, and criminal-family dynamic are substantially different.
The Ritual
Darkness? Yes.
Violence? Yes.
Possessive hero? Yes.
Sicko-like emotional history? Not really.
Torment by Dylan Page
This is actually a much closer emotional recommendation than most—but it is deliberately excluded here because it already appears in Eerie Efficiency’s existing recommendation pool.
That is exactly why this list reaches deeper instead of recycling the same fifteen BookTok titles again.
Common Misconceptions About Books Like Sicko
“If it has an MC, it is like Sicko.”
No.
There are cozy-ish biker romances, romantic-suspense biker romances, family-saga MC books, extremely violent one-percenter books, instalove biker stories, second-chance biker books, and pitch-black captivity stories.
The motorcycle tells you almost nothing about the emotional experience.
“Sicko is basically foster-brother romance.”
Also incomplete.
Remove the Wolf Pack, criminal danger, violence, secrets, and external trauma and you fundamentally change the book.
That is why Better When It Hurts is a great recommendation but not an exact substitute.
“More darkness means a better recommendation.”
No.
Similarity matters more than extremity.
A random 10/10-darkness captivity romance may have far less in common with Sicko than a 7/10 second-chance MC romance involving childhood attachment and a hero who changed during the separation.
“Possessive and protective mean the same thing.”
Absolutely not—and Sicko is a useful example of why.
A hero can protect because he values the heroine’s safety.
A possessive hero can protect because he views access to her as belonging to him.
Often dark-romance MMCs do both simultaneously, which is why the distinction gets messy.
For a deeper breakdown, read Dark Romance Hero and Character Archetypes: Possessive vs. Protective, Morally Gray Men, Dangerous Heroines, and More.
The Part of Sicko That Readers Either Love or Hate
Sicko does something that makes it addictive to one group of readers and exhausting to another:
it refuses to choose one source of drama.
There is family history.
Motorcycle-club danger.
Sexual trauma.
Trafficking.
Secrets.
Violence.
Criminal organizations.
Identity changes.
Betrayal.
Relationship taboo.
Plot turns that can feel as if another dark-romance novel just crashed through the wall and joined the story.
That excess is part of its identity. Even negative reader discussions frequently focus on how many dramatic threads the book combines.
So before choosing your next read, ask yourself:
Did you love Sicko because it was chaotic?
Or did you love one element inside the chaos?
That answer changes your next book completely.
Want the Taboo Without the Motorcycle Club?
Start with Better When It Hurts or Green Light.
And if the relationship being “wrong” is what keeps pulling you back into dark romance, the Eerie Efficiency guide to Every Dark Romance Trope Explained can help separate pseudo-sibling, age-gap, power-imbalance, captive, stalking, bully, and other taboo-adjacent dynamics.
Want the MC Without the Foster-Brother Element?
Start with Trigger, Nyx, or Lethal.
Those books preserve the sense that the MMC belongs to a violent brotherhood whose rules do not conveniently disappear once he falls in love.
For readers who prefer organized crime but aren’t married to motorcycles, 15 Dark Romance Books Like Nero moves the same possessive-dangerous-man craving into mafia territory.
You can also explore 15 Dark Romance Books Like Bound by Honor if loyalty, criminal family structures, and dangerous husbands matter more than outlaw clubs.
Want Obsession More Than Bikers?
Then leave MC romance entirely.
Try Dark Romance Books With Stalking—but a Happy Ending or 20 Dark Romance Books With Morally Grey Heroes.
That is one of the biggest advantages of identifying the actual craving rather than blindly searching “books like Sicko.”
You may discover you were never looking for motorcycles at all.
A Note for Readers Who Want Something Even More Personal
Sometimes what makes these books addictive isn’t the danger itself.
It’s the idea that the hero knew the heroine before everyone else did.
Before the trauma.
Before the adult defenses.
Before they learned how to hide from one another.
That emotional history changes a romance.
If that is your weakness, my original fiction He Was My Brother’s Best Friend First explores a different version of forbidden history: the relationship begins inside an already complicated personal connection rather than between strangers.
And if you want a darker relationship where emotional damage matters as much as attraction, What Breaks You is available free through Eerie Efficiency After Dark.
They are not replicas of Sicko—and they shouldn’t be.
They are for readers who have figured out that the thing they really crave is history turning into something dangerous.
Planning a Sicko-Level Reading Binge?
One practical warning: several of these are exactly the kind of books that turn “I’ll read one chapter” into 2 a.m.
If you’re settling in for Malice, Trigger, or an entire MC series, this backrest reading pillow on Amazon is one of those decidedly unsexy accessories that makes reading in bed substantially more comfortable.
Because apparently the realistic consequence of loving dangerous fictional men is back pain.
As an Amazon Associate, Eerie Efficiency may earn from qualifying purchases.
EE Expertise: How We Chose These Recommendations
Eerie Efficiency does not rate “similar books” by counting shared trope tags.
For this list, Sicko was broken into five major reading experiences:
Forbidden relationship history — Were the characters connected before the adult romance began?
MMC transformation — Is there meaningful contrast between who he once was and who he becomes?
Obsession/protection — Does attachment influence the MMC’s behavior in ways that genuinely affect the plot?
Criminal-world intensity — Is danger structural to the story rather than cosmetic?
Emotional damage — Does the romance force characters to confront past trauma, betrayal, separation, or guilt?
That is why Malice outranks some much more famous biker romances.
It is simply a better answer to the actual question.
Which Book Should You Start With?
Start with Malice if you want the closest overall emotional collision.
It contains the rare combination of foster-family history, separation, trauma, revenge, MC involvement, violent men, and a relationship that cannot be understood without knowing what happened years earlier.
Choose Better When It Hurts instead if why-choose romance is a dealbreaker.
Choose Trigger if the motorcycle-club world was your favorite part.
Choose Green Light if the taboo was your favorite part.
Choose Undeniable if you want the mess.
Not polished darkness.
Not aesthetic darkness.
Mess.
Frequently Asked Questions
What book is most similar to Sicko by Amo Jones?
Malice by Brooklyn Cross is the closest overall match on this list because it combines foster-sibling history, long separation, trauma, revenge, motorcycle-club involvement, violence, and an MMC who returns radically changed. It is MMFM/why choose, however, so readers wanting strictly MF romance should start with Better When It Hurts instead.
Is Sicko a motorcycle club romance?
Yes. Royce “Sicko” Kane is vice president of the Wolf Pack MC, and the motorcycle-club world is integral to his adult identity and the book’s danger.
Are Jade and Sicko biological siblings?
No. The novel’s premise identifies Royce as Jade’s foster brother, not her biological brother.
What should I read if I liked the foster-brother trope in Sicko?
Start with Malice or Better When It Hurts.
Malice adds an MC and an even larger trauma/revenge framework.
Better When It Hurts removes the biker setting but concentrates heavily on the painful foster-sibling history.
What should I read if I liked Sicko’s obsession?
Try Green Light, Malice, or Nyx.
For a larger obsession-only reading list, see Dark Romance Books Where He Becomes Obsessed With Her.
What should I read if I want something darker than Sicko?
Malice and Green Light are the first two I would investigate.
But “darker” can mean different things. Malice is more extreme in trauma and violence; Green Light is especially intense in toxic relationship dynamics and sexual boundaries.
Check content warnings carefully.
If you are unsure what specific warnings mean, use Every Dark Romance Trigger Warning Explained before choosing.
Are all these books standalones?
No.
Some belong to interconnected MC series, and Trigger explicitly begins a trilogy. Malice also begins a continuing series and should not be chosen if you absolutely require complete closure in one book.
Better When It Hurts, however, is published as a full-length romance that can stand alone despite being part of the Stripped series.
What if Sicko was too dark for me?
Start with Motorcycle Man, Hell’s Knights, or Kings of Mayhem.
You still get biker energy, possessiveness, romantic danger, or shared history without reproducing Sicko‘s full trigger intensity.
What if Sicko wasn’t dark enough?
Go directly to Malice or Green Light.
And check the warnings first.
Seriously.
Final Eerie Verdict
The mistake most “books like Sicko” lists make is recommending fifteen books that contain bikers.
That is the easiest part of Sicko to duplicate.
The harder part is finding the combination of history, forbidden attachment, trauma, protection, resentment, transformation, and criminal danger that makes Royce and Jade’s relationship feel different from an ordinary MC romance.
That is why Malice takes the top spot.
Better When It Hurts is the best recommendation for the foster-sibling dynamic.
Green Light is the strongest choice for taboo obsession.
Trigger is the best option for readers chasing the damaged MC monster.
And Nyx is the hidden gem for readers who loved that Jade knew the man underneath the identity everyone else feared.
Figure out which version of Sicko you are actually trying to replace.
Then choose accordingly.
Because sometimes “I want another book like Sicko” really means:
I want him dangerous to everyone else, complicated with her, and absolutely incapable of leaving her behind.
