The Necronomiconappears in multiple stories

The Necronomicon is a fictional ancient book, originally written under the title of Al Azif, in Arabic, c. 738 by Abdul Alhazred, a demonologist. It is banned, hated, and suppressed in all cultures, but various translations occasionally surface. Originals in Arabic are nearly non-existent. The work was re-titled and translated into Greek c. 950 by Theodorus Philetas, and an imperfect Latin re-translation from the Greek c. 1228 by Olaus Wormius is the version usually encountered in the various Cthulhu Mythos tales. An English-language translation is sometimes cited. The book conveys information about the Old Ones and is said to contain summoning rituals and various other spells. For example, a spell allowing a deceased sorcerer to regain control over their physical remains for purposes of revenge.

As typically described, the book is a giant tome, usually bound in leather, with rusting metal hasps and hinges. It is...