A book of horrific madness written by the Mad Arab Abdul Alhazred, detailing all sorts of insane supernatural unpleasantness which decent people ought not be interested in. Naturally, it is in the OUSFGLibrary. The NecroNomicon features prominently in the works of HPLovecraft, in which it plays a key part in the CthulhuMythos. Veiled references have been whispered that the NecroNomicon is related to the VoynichManuscripts. For a related document, see the OUSFGConstitution.