Three teenagers walk into a police station the morning after a barn party. Two bodies were left behind in the dark. Every one of them swears they are telling the truth, and every one of them is lying about something. That is the deceptively simple hook of Killing Sadie by Rachel Peterson, a young adult thriller from Simon Pulse that turns the humble witness statement into a weapon. I read it in two sittings, mostly because putting it down felt like leaving an interrogation halfway through.
Peterson is a debut novelist, and this is her first published book. She grew up in small-town Ohio, spent two decades in marketing and advertising, and clearly kept her old high school journals close while writing. It shows. The cafeteria politics, the cornfield parties, the currency of borrowed clothes and inside jokes all feel observed rather than invented.
The Story, Spoiler Free
Seventeen-year-old Sadie Cooper is dead. So is Mason Vreeland, the quiet art kid who apparently killed her, before Sadie’s boyfriend Ben stopped him for good. Sadie’s twin sister Jayne witnessed it all. On paper, the case is closed before it opens.
Except the accounts do not match. Sadie’s best friend Liz remembers one timeline. Jayne remembers another. Ben’s version bends whenever the questions get uncomfortable. A sharp state detective named Sloane Budd arrives to pull on the loose threads, and the novel becomes a slow tightening of the screws across three acts. The first act rewinds through the friendships, betrayals, and family secrets that led to the party. The second replays the night itself from competing angles. The third hands the microphone to Sadie herself in the weeks before her death, and that is where the floor drops out.
I will not reveal what she knows or what she missed. I will say that the blurb’s promise holds: the truth is hiding in plain sight, and attentive readers who track the small contradictions have a genuine shot at solving it before the reveal.
Why the Structure Works So Well
Four Voices, Four Agendas
The interrogation-room framing could have been a gimmick. Instead it becomes the book’s engine, because each narrator performs a different version of grief for a different audience. A few things stand out:
- Liz is the standout voice, a sharp-tongued Alabama transplant with a wrecked home life, a fierce loyalty to Sadie, and secrets she guards even from herself. Her chapters have real bite and real ache.
- Jayne narrates with an eerie, polished composure, all horseback riding and old Hollywood movies, and the gap between her poise and her circumstances keeps you squinting at her.
- Ben is the most uncomfortable read by design, a golden boy whose internal monologue quietly indicts him even while his statements stay clean.
- Sadie, when she finally speaks, is neither saint nor victim archetype. She is vain, warm, calculating, and heartbreakingly seventeen.
Clues That Actually Pay Off
Peterson plants her evidence with care. A matching necklace, a missing phone, a bottle of medication, a photograph in a darkroom: every object earns its place, and the reread value is high. The epigraphs from Romeo and Juliet and The Great Gatsby are not decoration either. Sadie’s obsession with the 1996 Romeo + Juliet film becomes a quiet thesis about girls who confuse performance with love, and it lands harder the longer you sit with it.
The Writing Style
Peterson writes in a fast, confessional first person that swings between wit and dread, sometimes within a single paragraph. Her teenagers curse, deflect, and self-mythologize the way real teenagers do. She also has a knack for the throwaway detail that does double duty: a Sour Patch Kids nickname that maps a whole friendship, a piece of green tape on a floor that becomes one boy’s entire coping mechanism. The prose is not showy, and it does not need to be. Its job is to make you trust voices you should not trust, and it does that job very well.
Where the Book Stumbles
An honest review of Killing Sadie by Rachel Peterson has to admit the seams. None of these broke the book for me, but they kept it shy of perfect:
- The middle act repeats itself. Because three narrators recount the same party to the same detective, certain beats get replayed three times. The discrepancies justify some of it, yet a tighter edit could have trimmed thirty pages without losing a single clue.
- The adults strain belief. Detective Budd is a terrific character, but her personal history with one family and her breezy takeover of the case ask for a generous suspension of disbelief about how investigations work.
- The teens are almost too articulate. These kids quote Casablanca and dissect love-bombing like seasoned therapists. It makes for quotable dialogue, though it occasionally sands away the awkwardness that makes YA voices ring true.
- The villain’s motive runs thin. Without spoiling anything, the why behind the final reveal leans on pure malice more than psychology. Readers who need their killers explained may finish the last chapter wanting one more layer.
- The closing chapter will divide people. The book ends on a formally bold note, a sequence of text messages that recontextualizes everything. I found it chilling. Others may find it abrupt after so much careful buildup.
A Note on Content
This is upper YA. Expect underage drinking, drugging, infidelity, emotional manipulation, and murder, all handled without gratuitous gore but without flinching either. Peterson also threads in a pointed critique of romantic gestures that ignore stated boundaries, and it is one of the smartest things the book does.
Best read with the lights on and your assumptions off.
Who Should Pick This Up
- Readers who loved the competing-testimony structure of One of Us Is Lying and want something meaner
- True crime podcast fans who enjoy catching witnesses in contradictions
- Anyone who thinks they can spot an unreliable narrator from a mile away (this book will humble a few of you)
- Book clubs, because the ending demands an argument
Sensitive younger readers, or anyone seeking a cozy mystery with a tidy moral, should probably look elsewhere.
If You Enjoyed This, Try These
Since Killing Sadie by Rachel Peterson wears its comp titles on the cover, here is a fuller shelf of similar books:
- How to Survive Your Murder by Danielle Valentine
- Dead Girls Can’t Tell Secrets by Chelsea Ichaso
- A Good Girl’s Guide to Murder by Holly Jackson
- We Were Liars by E. Lockhart
- The Cheerleaders by Kara Thomas
- Two Can Keep a Secret by Karen M. McManus
- People Like Us by Dana Mele
Full Disclosure, Filed Under Evidence
Since this is a book built on witness statements, let me submit my own for the record: the publisher sent me a copy of this novel in exchange for an honest opinion. No talking points were provided, and unlike certain characters in this story, I have no motive to shade the truth. Every word of praise and every complaint above is mine alone.
The Verdict
Killing Sadie by Rachel Peterson is a confident, cold-blooded debut that understands something essential about small towns and social hierarchies: the most dangerous lies are the ones everyone agrees to believe. It is baggy in the middle and occasionally too clever for its own good, but the voices are alive, the plotting rewards attention, and the final act delivers a gut punch that lingers. For a first novel, it is a striking arrival. For fans of twisty YA thrillers, it is close to essential. I closed the book, sat quietly for a minute, and then immediately flipped back to chapter one to see everything I had missed. That, more than anything, tells you what kind of thriller this is.