Need help finding possible comp titles (horror/fantasy)

Hello, I'm an (aspiring) writer and I would like to find books to help me write my book, and that could potentially be one of my comp titles in the future. I'm looking for a book that either is has a cult that worships a deity that actually exists (maybe like a horror folk book?) or has the theme of a God taking control of the characters life/makes them lose their autonomy? I'll be grateful for any suggestions if anyone will manage to help me find a book that has either of the two