The Greater Key of Solomon is a compilation of Solomonic magic drawn from various manuscripts of the 15th to 17th centuries. Book I provides conjurations, invocations, and curses to summon and constrain spirits and demons in order to compel them to do the conjuror's will. It also describes how to find lost items, become invisible, or gain favor with someone. Book II describes purification rituals which the occultist should undergo, how to dress for magical practices, and how to construct the necessary implements used in these rituals.