Scariest book on exorcisms.
*not for the squeamish or those with sensitive natures
When I was in school, we had a student who was particularly dedicated to fighting abortion through prayer in front of the clinic. After her sudden death, many students embraced her mission as their own. On the second or third aniversary of her death, a priest from Priest for Life, prayed in front of the clinic with us, and afterwords performed a "minor" exorcism of the building.
It closed within the year.
It didn’t scare me but I found it interesting how some in the book fell into possession.