"The Greater Key of Solomon is a 14th century grimoire written by an anonymous author and is divided in three parts called Books. It contains invocations, conjurations, and ways to summon spirits from the spirit realm as well as the spirits of demons and punished souls from Hell. The grimoire gives theoretical information and step-by-step practical guidance on an array of topics such as planetary hours, celestial bodies, prayers, ritual preparation, communication with angels and spirits, exorcisms, magickal amulets, the preparation and use of ritual equipment, and more"--