The infamous "Book of the Devil," also known as the "Grand Grimoire," claims to hold the secrets to summoning demons? This 19th-century text allegedly includes a recipe for a potion that could let you talk to the dark side! Some people believe it was penned by a former pope who decided that being holy was overrated. Legend has it that if you read it aloud, strange events start happening—like your cat suddenly judging your life choices.