AN INTERNATIONAL BESTSELLER • A high school senior is on a mission to solve her sister’s murder in this twisty enemies-to-lovers thriller, full of secrets, rich-people privilege, and sisterly rage that will not die until the killer is found.

“A tantalizing summer thriller, recommended for romance fans looking to try something new.”—School Library Journal

“Slow-burn mystery at its finest, with a scintillating frenemies-to-lovers romance that will keep you up far past your bedtime.”—Alexa Donne, Edgar Award-nominated author of The Ivies

Eighteen-year-old Addie Blackwood regrets nothing more than one horrible, mistake-filled night last summer. Hours after she hurled the worst words she could think of at her sister, Fiona was found dead at the bottom of a ravine. The police ruled her death an accident, but Addie’s never bought it. Her ballet-prodigy sister didn’t slip and fall; she was pushed. And Addie’s number one suspect: Thatcher Montgomery, the rich kid down the street who always had a thing for Fiona.

But when Thatcher is found dead in the same ravine, Addie must admit she was wrong. And now her only ally (and alibi) in catching the real killer is none other than her childhood rival, Seth Montgomery—Thatcher’s cousin and the boy she’s always loved to hate. Arguing with Seth is easy; working with him without thinking of that night last summer, near impossible.

As Addie and Seth dodge corrupt police and his even more corrupt family, their investigation pulls them closer than ever before. But as they approach the explosive and murderous truth, their growing bond may not be enough to keep Addie safe—in fact, it may turn her into the next victim.