Welcome to Carvell Academy. . . darkness awaits. This twisty thriller by the #1 New York Times bestselling author of Our Infinite Fates follows two roommates who must solve an infamous cold case on their campus after a new victim is claimed. "A modern gothic gem."--Samantha Shannon, New York Times bestselling author Ten years ago, four students lost their lives in the infamous unsolved North Tower murders at the elite Carvell Academy of the Arts, forcing the school to close its doors.​Now Carvell is reopening, and fearless freshman Lottie Fitzwilliam is determined to find out what really happened. But when her beautiful but standoffish roommate, Alice Wolfe, stumbles upon a sinister soul-splitting ritual in a book hidden in Carvell's library, the North Tower claims another victim. Is there a killer among them . . . or worse, within them?