So many people helped me along the journey from idea to publication, and I will be forever grateful to all of them. First, a profound thank-you to Rosemary Stimola and Allison Remcheck, without whom this book wouldn’t exist. Thank you for taking a chance on me, and for your brilliant advice and unwavering support.

To Krista Marino, thank you for being an incredible editor and for your deep understanding of my story and its characters. Your insightful feedback and guidance strengthened this book in ways I didn’t realize were possible. To all the team at Random House/Delacorte Press, I’m honored to be counted among your authors.

Writers are so much better when they’re part of a community. To Erin Hahn, my first critique partner, thank you for being an honest critic, a tireless cheerleader, and a good friend. Thank you Jen Fulmer, Meredith Ireland, Lana Kondryuk, Kathrine Zahm, Amelinda Berube, and Ann Marjory K for your thoughtful reads and words of wisdom. Every one of you made this book better.

Thank you, Amy Capelin, Alex Webb, Bastian Schlueck, and Kathrin Nehm for bringing One of Us Is Lying to audiences around the world.

Thank you to my sister, Lynne, at whose kitchen table I sat and announced, “I’m finally going to write a book.” You’ve read every word I’ve written since, and believed in me when all this seemed like a pipe dream. Thank you, Luis Fernando, Gabriela, Carolina, and Erik for your love and support, and for putting up with my laptop at family gatherings. Thank you, Jay and April, who are part of every sibling story I write, and Julie for always checking in on book progress.

Deep gratitude to my mom and dad for instilling in me a love of reading and the discipline required for writing. And to my second-grade teacher, the late Karen Hermann Pugh, who was the first to ever call me a storyteller. I wish I could have thanked you in person.

All the love in the world to my kind, smart, and funny son, Jack. I am proud of you always.

And finally, to my readers—thank you from the bottom of my heart for choosing to spend your time with this book. I couldn’t be happier to share it with you.