Weird fiction author H.P. Lovecraft created a mythology that includes bizarre monsters, troubled communities, insane scholars and a library of books filled with forbidden lore. Of all the books detailing this mythology that Lovecraft mentions in his fiction, one in particular captures the imagination more than any other: the “Necronomicon.” According to Lovecraft, it’s a tome filled with secrets and rituals that can drive a reader to the brink of insanity.

In reality, the “Necronomicon” doesn’t exist, though more than a half dozen books with the title “Necronomicon” are available at bookstores.