In the late eighteenth century, Catholic priest Johann Joseph Gassner (1727-1779) discovered that he had extraordinary powers of exorcism. Deciding that demons were responsible for most human ailments, he healed thousands, rich and poor, Protestant and Catholic. In this book H. C. Erik Midelfort delves deeply into records of the time to explore Gassner's remarkable exorcising campaign, chronicle the official efforts to curb him, and reconstruct the...