(Medieval Latin, anglicised , from Greek  goeteia "sorcery") refers to a practice which includes the invocation of angels or of demons, and usage of the term in English largely derives from the 17th-century grimoire The Lesser Key of Solomon, which features an Ars Goetia as its first section. It contains descriptions of the evocation of seventy-two demons, famously edited by Aleister Crowley in 1904 as The Book of the Goetia of Solomon the King.