The Demonologist: The Extraordinary Career of Ed and Lorraine Warren Paperback – September 13, 2002 by Gerald Brittle 
 
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. Over twenty years in print, here is the original uncut version of this classic text. Illustrated with photographs of phenomena in progress, every sentence in the book is true. Used as a text in seminaries and classrooms, this is one book you can't put down.
 
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