You Know What You Did

AGATHA AWARD WINNER Best First Mystery

ANTHONY AWARD WINNER Best First Novel

LEFTY AWARD FINALIST Best Debut Mystery

MACAVITY AWARD NOMINEE Best First Mystery

A People Magazine Best Book of April 2024 | “Readers’ Most Anticipated Mysteries & Thrillers of 2024” Goodreads | “The Best Mysteries and Thrillers of 2024” BookBub | “Best of the Best Mystery, Crime Fiction, and Thrillers of 2024” Deadly Pleasures Mystery Magazine | “The 64 Best Mystery, Thriller, True Crime Books of 2024″ Parade | “The Best Mystery and Thriller Books of 2024″ Elle

“A dizzying thriller that centers around mental illness, generational trauma, and how much we really know even those closest to us.” —People

“With unflinching determination, Nguyen keeps readers pinned to the page in this dark, devastating psychological horror.” —Elle

“An unsettling domestic thriller” —The Telegraph

“[A] razor sharp debut…Here, complications from untreated mental illness drive the unreliable narrator trope for a swirly, tangled hair-raiser…As sinister as it is emotional, You Know What You Did explores mother-daughter relationships and generational trauma with taut, captivating prose and a touch of horror.” —Seattle Times

“In this harrowing thriller, the main character has an increasingly fractured mind, leading to dizzying twists.” —The Everygirl

“You Know What You Did is a gripping mystery for fans of Lisa Jewell and Celeste Ng that’ll have you on the edge of your seat. ” —Pure Wow

“This is a hot tamale of a release.” —Bookriot

“A twisty, horror-filled thriller… [an] incredibly compelling debut” —Booklist (*Starred Review*)

“[An] exhilarating debut…Braiding together hair-raising psychological suspense and poignant study of war’s intergenerational trauma, Nguyen adds depth to the familiar setup of the unreliable, mentally ill heroine. Lisa Unger and Tess Gerritsen fans, take note.” —Publishers Weekly

“The descriptions of Annie’s OCD…and her struggles to control it are particularly visceral…[An] exploration of generational trauma and mental illness…There is healing to be had in the journey and the ending.” —Kirkus Reviews

“Although this is Nguyen’s debut, her voice is already self-assured and powerful, and I can’t wait to see what she does next.” —CrimeReads

“This book knocked the wind out of me. On top of its razor sharp twists and visceral scares, You Know What You Did taps into the true horror experienced by so many refugees and war survivors, and the way that trauma lives on through generations. Don’t miss this brilliant thriller from a powerful new voice.” —Ana Reyes, New York Times bestselling author of The House in the Pines

“You Know What You Did is an exciting, complex thriller that takes the reader on a thoroughly disturbing journey through the mind of a protagonist who may or may not be the villain. At times harrowing and heartfelt, You Know What You Did will keep you on the edge of your seat until the final page.” —S.A. Cosby, New York Times bestselling author of Razorblade Tears and All the Sinners Bleed

“K.T. Nguyen’s You Know What You Did is a stunning debut, a complex and compelling thriller that grabbed me from the first page and didn’t let go until the very end. Nguyen’s keen eye for detail and gorgeous prose contrasts with her deeply tormented narrator to set up an escalating tension that elevates this novel far above most domestic thrillers. I loved this book!” —Karen Dionne, #1 internationally bestselling author of The Marsh King’s Daughter and The Wicked Sister

“Creepy-crawly and terrifyingly brilliant, You Know What You Did heralds the arrival of the remarkably talented K.T. Nguyen. Intergenerational trauma, mental health issues, and core memories are at the heart of this gripping, raw debut. With expert care, seamlessly structured time jumps, and a propulsive plot, Nguyen has crafted a genius, powerful, emotional thriller I will never forget.” —Samantha M. Bailey, USA Today and #1 international bestselling author of A Friend in the Dark

“You Know What You Did is a masterful puzzle begging to be solved. With an unreliable narrator you can’t help but root for, plus twists and turns galore, I tore through this captivating debut with my breath held. I can’t wait to read whatever K.T. Nguyen writes next.” —Stephanie Wrobel, USA Today bestselling author of Darling Rose Gold and This Might Hurt

“A stunning debut that will stay with you. You Know What You Did is not only a twisty psychological thriller, it’s a gripping story about the wars we wage from within, the fallacy of the American Dream, and, most of all, the love, dreams, and fears mothers hold for their daughters.” —Alex Finlay, author of The Night Shift

“I got totally drawn in by this unusual, mysterious, atmospheric story and its complex protagonist. With themes of identity, guilt, mental illness, and fragmenting reality, you never quite know who or what to believe. Right until the end, I kept changing my mind about how all the intriguing pieces of this disturbing puzzle might resolve. It’s definitely worth reading it to find out!” —Helen Cooper, author of The Downstairs Neighbor and The Couple in the Photo

“Eerie and unexpectedly emotional, You Know What You Did is a deceptive roller coaster ride. Nguyen’s expertly crafted thriller layers in the intricate experience of being a first-gen immigrant daughter to create a story that stays with you long after its shocking conclusion.” —Erin E. Adams, the Edgar, Bram Stoker, and Shirley Jackson Award-nominated author of Jackal

“I raced through this utterly suspenseful book. K.T. Nguyen kept me guessing with each new reveal, all while exploring generational trauma and mental illness compassionately and compellingly. You Know What You Did is dark, insightful, and absorbing.” — Tracy Sierra, author of Nightwatching