Ed and Lorraine Warren are considered America's foremost experts on demonology and exorcism. With thousands of investigations to their credit, they reveal what actually breaks the peace in haunted houses and how it can happen to you. Don't miss the Warrens in the blockbuster film The Conjuring. In The Demonologist the Warrens discuss many of their cases including Annabelle and the Enfield Poltergeist -- those case files are the basis for the upcoming films Annabelle and The Conjuring 2: The Enfield Poltergeist. If you think ghosts are only responsible for hauntings, think again. Used as a text in seminaries and classrooms, this is one book you can't put down. Now includes exclusive photographic documentation of phenomena in progress.