The Door of the Unreal is a novel written by Gerald Biss and first published in 1920. The book tells the story of a man named Richard Haven, who inherits a large English estate from his uncle. Haven soon discovers that the estate is haunted by a mysterious woman who appears to be from another world. As Haven becomes more and more obsessed with the woman, he begins to lose touch with reality and becomes convinced that he can enter the door of the unreal...