A book of magic. A manual of spells, invocations, and occult procedures, often imagined as dangerous, secretive, and thick with marginalia and smoke. Where a spellbook can sound playful, a grimoire carries the weight of forbidden method, magic as studied craft.

From French grimoire, originally “grammar book” in medieval usage—a reminder that Latin learning itself once looked like sorcery to the unlettered. Over time the word drifted from rules of language to rules of enchantment: the mysterious book becoming the mysterious book.