Grimoire
Grimoire is a book of witchcraft or paranormal magic. The word is pronounced "grim-warr".
The word is a mistaken way of saying grammar. It probably started being used in a time when not many people could read. Then any book might be thought to contain instructions for magic.
In the religion of Wicca and other forms of Neopaganism, such a book is sometimes called a "Book of Shadows".
Grimoire Media
Icelandic grimoire, "Galdrabók" ((Catalan)), belonging to Swedish History Museum (signum: ATA Ämb 2 F16:26)
Page from the Greek Magical Papyri.
An excerpt from Sefer Raziel HaMalakh, featuring magical sigils (Hebrew: סגולות, romanized: seguloth).
A man incorporated into a pentagram, from Heinrich Cornelius Agrippa's De Occulta Philosophia (Eng., Three Books of Occult Philosophy). The signs on the perimeter are astrological.