The most unusual and thought- provoking of Buchan's supernatural works is the novel The Gap in the Curtain (1932), which deals with fate and free will. Building on Dunne's theory of serial time, Professor Moe works out a technique for visualizing the future-in this case a newspaper of a year hence. The characters, who are types of our civilization, scramble about trying either to fulfill or to ward off what has been seen. a capable suspense story.- Sullivan, The Penguin Encyclopedia of Horror and the Supernatural