Books like The Boy Who Couldn't Die

When seventeen-year-old Ken's best friend Roger dies in a plane crash, Ken suddenly realizes that he too could die at any moment. Terrified, he seeks out a plump, middle-aged psychic named Cherie Buttercup, who grants him invulnerability from death in exchange for his soul. Eager to test his new powers, Ken talks his family into a vacation in the Caribbean, where he can swim with sharks. There he is entranced with Sabine, a young scuba instructor, and shares his story with her. When Ken begins to have vivid dreams of secret murders, he and Sabine realize that Cherie Buttercup is using his soul as a zombie to do her will. But the dreams also give clues as to where his soul is hidden--so the pair set out to retrieve it.- Patty Campbell (Amazon.com review)