The Last Child is a suspense thriller novel by John Hart. This winner of the 2010 Edgar Award for Best Novel follows 13-year-old protagonist Johnny Merrimon and his quest to find his twin sister who suddenly vanished. No one believes that Alyssa is still alive except for Johnny and Police Detective Clyde Hunt, who has never stopped looking for the girl. Johnny's quest leads him to an exploration of the dark side of his hometown. Themes explored in The Last Child include powerlessness, violence, and obsession.