"Summerlost" is a young adult novel by American author Ally Condie, published in 2016. The story follows 12-year-old Cedar Lee, who is spending the summer in a new town with her mother and younger brother, after her father and other brother died in a car accident the previous year. Cedar becomes involved in a local theater festival and befriends a boy named Leo, who shares her interest in the festival and the life of a deceased actress who was born in the town. Cedar also starts working at the festival's concession stand, where she meets a mysterious woman who seems to know more about Cedar's family than she lets on. As Cedar unravels the mysteries of the town and her own past, she comes to terms with her grief and learns to appreciate the joys of life. The novel is praised for its sensitive portrayal of grief and loss, as well as its vivid descriptions of summer and theater. It has been recommended for young adult readers who enjoy coming-of-age stories and emotional journeys.