Blackthorn by J.T. Geissinger book cover
Last information check:
?An automated source lookup or an editor’s sourced check was recorded on this date. A lookup may have found no match. This does not mean all Eerie ratings, tropes, content warnings or Kindle Unlimited availability were reverified. Field verification is shown separately.
Eerie Efficiency Book Profile

Blackthorn

Readable on its own: recorded 2025 Adult
About this book

Maven Blackthorn returns to her Vermont hometown with her daughter, hoping to settle family affairs and leave again. Instead, an empty grave and a house full of secrets draw her back toward Ronan Croft, the first love she has spent twelve years avoiding. As attraction collides with threats, missing memories and disturbing encounters, Maven struggles to decide whom she can trust—and whether she can trust what she sees.

Eerie editorial description
Search Amazon for This Book ↗

Affiliate link — I may earn a commission. As an Amazon Associate I earn from qualifying purchases.

Best for readers who like: Gothic mysteries, combative banter, possessive former lovers, family secrets, unreliable narration and extreme supernatural horror.
What do these ratings mean?

These are Eerie's editorial scores. Spice is scored out of 5; the other scores are out of 10. Higher intensity does not mean a better book. Romance Focus measures how central the relationship is to the story. Overall Recommendation is Eerie's recommendation for the book's intended readers.

Read the full rating methodology

Spice4/5
Darkness9/10
Obsession8/10
Psychological9/10
Violence8/10
Emotional Damage8/10
Trigger Intensity10/10
Romance Focus7/10

Bibliographic Sources

Source records for this Book. Automatic source checks do not verify Eerie ratings, tropes or content warnings.

Book at a Glance

Readable on its ownyes
POVFirst person • Multiple POV
PaceMedium
Story LengthStandard
EndingHFN
WorldContemporary • Paranormal
Settingsmall town
RelationshipM/F
Obsession TypeRomantic Fixation
SubgenreGothic dark romance • horror-adjacent • romantic suspense
MMC TypeMorally Gray / Black
FMC TypeDefiant/Strong • Survivor / Trauma
MMC OccupationCEO
Writing StyleAtmospheric / Gothic • Erotic / Explicit • suspenseful
MMC PersonalityRonan Croft is the adult billionaire CEO of Croft Pharmaceuticals and Maven’s secretive first love. Intense, possessive and protective, he also uses threats and manipulation to regain control of their relationship. His family’s influence and disturbing secrets shape the danger around them; his exact current age is not explicitly stated.
FMC PersonalityMaven “May” Blackthorn is an adult single mother and entomologist returning to Solstice, Vermont. Protective, defiant and scientifically minded, she uses sharp humor to guard her grief and distrust. She is explicitly under thirty; an exact current age is not stated.

Tropes & Themes

Trigger Warnings

These tags describe potentially sensitive material in the book and may not be a complete list. A missing warning does not confirm that the content is absent. HEA/HFN describes the romantic ending, not the absence of disturbing content. Check the author's current content notes before reading.

Abortion pressurebloodbody horrorbullyingcaptivitychild death referenceschild endangermentcoercive controldeathdruggingdubconfiregoregraphic sexgriefhallucinationshuman sacrificeIncestmemory lossmurderNonconoccult/religionparental deathPast teen pregnancypossible harm to a childsexual assaultstalkingstrangulationsubstance usesuicide referencesviolence

Eerie Take

Best approached as a disturbing gothic romance with a substantial horror plot. The romantic commitment is hopeful, but the final ambiguity and explicit sexual violence make this a poor fit for readers seeking a reassuring or low-trigger romance.

Maven Blackthorn returns to her Vermont hometown with her daughter, hoping to settle family affairs and leave again. Instead, an empty grave and a house full of secrets pull her into a mystery that keeps leading back to the powerful Croft family—and Ronan, the first love she has spent twelve years avoiding.

As old attraction collides with threats, missing memories and increasingly disturbing encounters, Maven struggles to decide whom she can trust—and whether she can trust what she sees.

This gothic romance moves into explicit sexual violence and supernatural horror. The couple reaches a hopeful commitment, while the final pages leave the nature of the horror unsettled. Content includes perceived sibling incest, coercive control, sexual assault, ritual murder and child endangerment.

Help keep Eerie accurate.Reader reports are reviewed before anything is changed.
Book vs BookPut this title beside another Eerie Book and compare editorial ratings, tropes, endings, and content notes.
Compare This Book
Personal content guidance

Can I Handle This Book?

Log in so Eerie can privately compare this book's verified darkness, spice, obsession, violence, triggers, and ending with your Reading DNA.

Separate reader consensus

Eerie Ratings vs Reader Ratings

Eerie’s editorial intensity scores never change because readers vote. Community averages are calculated separately from voluntary public submissions.

Reader enjoymentNo votes yet0 public ratings
Intensity
Eerie editorial
Readers
Spice
4/5
Waiting for votes
Darkness
9/10
Waiting for votes
Obsession
8/10
Waiting for votes
Psychological Intensity
9/10
Waiting for votes
Violence
8/10
Waiting for votes
Emotional Damage
8/10
Waiting for votes
Trigger Intensity
10/10
Waiting for votes
Romance Focus
7/10
Waiting for votes
Add your reader ratingLog in to submit one anonymous, editable community vote for this book.
Log In to Rate

Community totals never display a reader’s name, email, shelves, private star rating, notes, DNF history, or Reading DNA. One account gets one editable vote per book.

Your private reading record

Save to My Eerie Library

Track your reading status, progress, ownership, favorites, rating, dates, rereads, and private notes.

Help Eerie stay accurate

See something wrong?

Eerie ID

Reports enter a private editorial review queue. Nothing you submit changes a Book automatically.

Your dark romance companion

Keep Eerie on your home screen

Install Eerie Efficiency through your browser. Your existing account works here; you may need to sign in again in the app.

iPhone or iPad

  1. Open this site in Safari.
  2. Open the Share menu, then choose Add to Home Screen.
  3. If shown, leave Open as Web App enabled, then tap Add.

Android

Open this site in Chrome. Tap the browser menu, then Install app or Add to Home screen, if available.

Computer

In Chrome or Edge, look for the install icon near the address bar, or use the browser’s app installation menu. Options vary by browser.

If you opened Eerie inside Facebook, Instagram or another app, first open it in Safari or Chrome.

Books, searches, quizzes and your library need an internet connection. Your private reading information is not saved for offline viewing.