Grimoires are textbooks for magical works. They appeared around the 4th century BCE, and really took off in medieval Europe. Grimoires have the reputation for being cryptic, but were often straightforward documents, including step by step instructions for creating magical objects, performing magical spells, and summoning angels and demons to do your bidding.
I am one of those gods, the Powers who effect the triumph of Osiris over his adversaries on the day of the Weighing of the Words : I am thy kinsman, Osiris.
