This work includes the complete unabridged version with variants of The Nine Great Keys, a vital early 17th century manuscript detailing the invocation of the Archangels and nine Orders of Angels. The full practical techniques of summoning the Archangels, details of the hierarchies of spiritual beings, and how the full Enochian system fits in with the Angelic and Demonic hierarchies are all covered, as well as the theology and philosophy associated with Angelic magic, giving the context that these magical practitioners were working with. It includes the evocation of the Four Demon Princes and their role within the traditional system of magic. The book deals clearly with the full continuum of spiritual creatures from Archangels through Angels to Demon Princes (Fallen Angels), to Olympic Spirits and Elementals. This is presented in practical detail, with much rare manuscript material being made available in print for the first time.