If you think ghosts are only responsible for hauntings, think again. The Demonologist reveals the grave religious process behind supernatural events and how it can happen to you. Used as a text in seminaries and classrooms, this is one book you can't put down. For over five decades, Ed and Loraine Warren have been considered America's foremost experts on demonology and exorcism. With over 3,000 investigations to their credit, they reveal what actually breaks the peace in haunted houses. The book was expertly written by Gerald Daniel Brittle, a nonfiction writer with advanced degrees in literature and psychology, specializing in mystical theology. Don't miss the Warrens in the new blockbuster movie The Conjuring.