The Man In The Dark is a novel written by Albert Payson Terhune, first published in 1921. The story revolves around the character of John Keith, a successful businessman who suddenly disappears without a trace. His wife, Marjorie, hires a private detective to find him, but he is unable to locate John. Meanwhile, John is being held captive by a mysterious man who keeps him in a dark room and refuses to reveal his identity. As the days go by, John begins...