possession

Peter Sacco is a psychologist who writes on a variety of topics, including haunting, spirit possession, and poltergeists. He has a unique perspective as both a psychologist and an investigator of these strange phenomena.

Dr. Patrick McNamara connects nightmares with a malevolent spirit world. Others have looked at death by night terror or the links with mental illness.

Exorcism has a new name—spirit release therapy—and a place in psychologists’ offices.