A grimoire is a textbook of magic. Books of this genre, typically giving instructions for invoking angels or demons, performing divination and gaining magical powers, have circulated throughout Europe since the Middle Ages.
The word grimoire is from the Old French grammaire, and is from the Greek root "grammatikos", “relating to letters”, from which grammar, a system for language, and glamour, influential appeal, are derived. In the mid-late Middle Ages, Latin "grammars" (books on Latin syntax and diction) were foundational to school and university education, as controlled by the Church—while to the illiterate majority, non-ecclesiastical books were suspect as magic, or believed to be endowed with supernatural influence.
The word "grimoire" came over time to apply specifically to those books which did indeed deal with magic and the supernatural.
Similar magical writings have existed from antiquity, and although these are not in the same genre of medieval magic, they are sometimes described as grimoires. (Taken from Wikipedia)
A grimoire is a textbook of magic. Books of this genre, typically giving instructions for invoking angels or demons, performing divination and gaining magical powers, have circulated throughout 