Lovecraft mentions the Necronomicon in several stories (such as "The Call of Cthulhu") but it didn't really exist, and I don't think he wrote one. It was later on that some writers, after reading Lovecraft, took it upon themselves to write Necronomicons. I have no idea what might be in such books, never having picked one up. I don't really want to find out.eG said:HP Lovecraft wrote the Necronomicon in the 1930s because so many people thought his horror stories were real. It's a work of fiction.