"The Girl Who Was Supposed to Die" is a young adult thriller novel by April Henry. The story follows a teenage girl named Cady who wakes up in a remote cabin with no memory of who she is or how she got there. As she escapes, she discovers that someone is trying to kill her, and she must piece together her identity while evading danger. Throughout her journey, Cady encounters various characters who help her uncover the truth about her past. The novel explores themes of survival, trust, and the quest for self-discovery, keeping readers engaged with its suspenseful plot and unexpected twists.