https://www.amazon.com/Demonic-Foes-Psychiatrist-Investigates-Possessions/dp/0062876473

Demonic Foes: My Twenty-Five Years as a Psychiatrist Investigating Possessions, Diabolic Attacks, and the Paranormal

by Dr. Richard Gallagher

Successful New York psychiatrist Richard Gallagher was skeptical yet intrigued when a hard-nosed, no-nonsense Catholic priest asked him to examine a woman for a possible exorcism. Meeting her, Gallagher was astonished. The woman’s behavior defied logic. In an instant, she could pinpoint a person’s secret weaknesses. She knew how individuals she’d never known had died, including Gallagher’s own mother, who passed away after a lengthy battle with ovarian cancer. She spoke fluently in multiple languages, including Latin—but only when she was in a trance.

This was not psychosis, Gallagher concluded. It was, in his scientific estimation, what could only be described as paranormal ability. The woman wasn’t mentally disturbed—she was possessed. This remarkable case was the first of many that Gallagher would encounter. Sought after today by leaders of all faiths—ministers, priests, rabbis, and imams, Gallagher has spent a quarter-century studying demonic activity and exorcisms throughout history and has witnessed more cases than any other psychiatrist in the world today.