Now from the bestselling author of The Cure for Modern Life and Once Upon a Day comes a riveting story of suspense about a literature professor whose carefully constructed life is shattered after the death of her twin brother and the unraveling of the secret world they shared. On a March afternoon, while Lila Cole is working in her quiet office, her twin brother Billy points an unloaded rifle out of a hotel window, closing down a city block. “Suicide by police” was obviously Billy’s intended result, but the aftermath of his death brings shock after shock for Lila when she discovers that her brilliant but troubled twin—the person she revered and was closer to than anyone in the world—was not only estranged from his wife, but also charged with endangering the life of his middle child and namesake, eight-year-old William.