Billy is sent to Camp Nightmoon for the summer, but something is terribly wrong. The camp director is missing, the counselors are strange, and fellow campers keep disappearing. When Billy tries to write to his parents for help, he discovers his letters are never being sent. He must uncover the horrifying secret of the camp before he becomes the next to vanish. This thrilling story by R. L. Stine builds suspense with every page, leading to a shocking twist that will leave readers breathless and questioning reality itself.