I am really interested in demons lol. Just the theory of what they are, how they get in a body, why and who they choose, what they want, exorcisms etc, mainly from a catholic perspective. But I've never really seen a book, like we have our movies in exorcisms, but I've never actually heard of a book about someone being possessed and exorcised and a plot that involves occultism and rituals and all that, that isn't excessively gory. I want a book that has these elements, but doesn't have any, or minimal animal, child or sexual abuse. Something with a really spooky vibe but that also goes into a lot of theory about the topic of demons, because I'm fascinated by it. Thanks in advance!
Edit: I should mention I'm looking for fiction, but I don't necessarily mind non-fiction, as long as it's mainly about the topic of demons alone, since I'm not a religious person and don't like to read about it generally
by Dependent_Name5489