Richard Gallagher, MD, a board-certified psychiatrist, is a professor of psychiatry at New York Medical and a psychoanalyst on the faculty of Columbia University. He graduated from Princeton University, Phi Beta Kappa in classics, and trained as a resident in psychiatry at Yale University School of Medicine. The world’s foremost scientific expert on the subject of diabolic attacks, he has been an active member of the International Association of Exorcists since the 1990s. He lives in Westchester, New York.

“A thought-provoking read sure to attract intrigued skeptics and believers alike.” — Booklist“Dr. Gallagher brings his trained intellect and unimpeachable integrity to bear on a serious scholarly study of suspected demonic possession.” — Joseph English, MD, Sidney E. Frank Distinguished Professor of Psychiatry and Behavioral Sciences, New York Medical College“This book is extremely helpful coming as it does from America’s ‘go-to’ medical expert on the subject of diabolic attacks. Whenever I need help, I go to him.” — Rev. Gary Thomas, exorcist for the Diocese of San Jose, California“Dr. Gallagher is unquestionably a world expert in the rarefied area of diabolic possession, and in distinguishing that state from psychiatric and neurological conditions.” — Mark Albanese, MD

Richard Gallagher, MD, a board-certified psychiatrist, is a professor of psychiatry at New York Medical and a psychoanalyst on the faculty of Columbia University. He graduated from Princeton University, Phi Beta Kappa in classics, and trained as a resident in psychiatry at Yale University School of Medicine. The world’s foremost scientific expert on the subject of diabolic attacks, he has been an active member of the International Association of Exorcists since the 1990s. He lives in Westchester, New York.

“A thought-provoking read sure to attract intrigued skeptics and believers alike.” — Booklist“Dr. Gallagher brings his trained intellect and unimpeachable integrity to bear on a serious scholarly study of suspected demonic possession.” — Joseph English, MD, Sidney E. Frank Distinguished Professor of Psychiatry and Behavioral Sciences, New York Medical College“This book is extremely helpful coming as it does from America’s ‘go-to’ medical expert on the subject of diabolic attacks. Whenever I need help, I go to him.” — Rev. Gary Thomas, exorcist for the Diocese of San Jose, California“Dr. Gallagher is unquestionably a world expert in the rarefied area of diabolic possession, and in distinguishing that state from psychiatric and neurological conditions.” — Mark Albanese, MD