One spring afternoon after school, Amber arrives home on her bike. Its just another perfectly normal day. But when Ambers mom sees her, she screams. Because Amber died seven years ago, hit by a car while on the very same bicycle shes inexplicably riding now. This return doesnt only impact Amber. Her sister, Melissa, now seven years older, must be a new kind of sibling to Amber. Ambers estranged parents are battling over her. And the changes ripple farther and farther out: Ambers friends, boyfriend, and even people she met only once have been deeply affected by her life and death. In the midst of everyones turmoil, Amber is struggling with herself. What kind of person was she? How and why was she given this second chance? Gayle Forman brilliantly explores the porous veil between life and death, examines the impact that one person can have on the world, and celebrates life in all its beautiful complexity.