I Know What You Did: A Novel

When a bestselling novel fictionalizes the death of her childhood best friend—and accuses her of the murder—Petal Woznewski must figure out who wrote it and why. Truth and fiction collide in this captivating debut novel by Cayce Osborne.

Petal Woznewski is content with her quiet, introverted life in New York City: she has her junk food, her movies, and her on-again, off-again boyfriend, Gus. That peace is shattered when her name appears on the dedication page of an anonymously written thriller with a cryptic note: “I know what you did, Petal Woznewski. And now everyone else will, too.”

As she reads, Petal realizes the story is rooted in a secret she buried thirty years earlier, when she was fourteen. A secret involving the tragic death of her friend, Megan. A secret that only one other person knows—their old friend, Jenny. Armed with a copy of the book and her own suspicions, Petal returns to her hometown of Madison, Wisconsin. There, she discovers more questions than answers. Jenny has disappeared, and Petal’s old high school crush, Ben, doesn’t know anything about the book—at least not anything he’s telling.

As sinister clues pile up, and the thriller’s plot detours dangerously from the facts, Petal has no choice but to confront her past and solve the mystery of who wrote it—before her very real life ends as tragically as the novel.

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Published Jul 18, 2023

272 pages

Average rating: 7.77

22 RATINGS

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Community Reviews

Andrea-The Shelf Life Books
Jul 03, 2025
8/10 stars
Petal Wosnewski is a bit of a loner. Most of her time is spent trying to forget her past. She grew up in Wisconsin and now, in the present is in New York City. Petta is shaken when she find out that a new bestselling novel which has  a very similar story to her traumatic adolescence back in Madison, but also the protagonist shares Petals exact name. She sets out to try and find who is digging up her darkest secret. Could it be the person that swore to take that secret to the grave with...or someone else who may know their secret?

As a debut novel I was really thrilled1 I loved the structure of the chapters being mainly the narrator, with some excerpts from the book-within-the-book. Perfect!  Overall, I definitely enjoyed this fun thriller and would recommend it to my thriller genre loving friends.  I rated this 4 stars.
 
Thank you to NetGalley, the author, and the publisher for the opportunity to read and review an advanced reader's copy of this book.
Sara King
Sep 02, 2023
7/10 stars
Takes place in Madison, WI, so loved that!

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