Ever wanted to know how you can be a demonologist? From the author who brought you Mechanics of Demonology and Screech Owl: The Lie Behind Lilith, comes, How to be a Demonologist. Renowned exorcist G.P. Haggart compiles all the information you will need to become a demonologist. In this book you will learn the steps to take to become a preternatural investigator and help clients and churches battle against demonic forces.