Anyone interested in the western esoteric tradition, especially the philosophy of The Hermetic Order of the Golden Dawn, should read this book. Regardie's Tree of Life is invalueable to the student of both Qabalah and magic, introducing us to the methods employed by Aleister Crowley, the Golden Dawn and the Goetia. Regardie has extensively studied rituals of the Ancient Egyptians and Greeks and outlines simple formulas for performing the most complex rituals founded upon ancient knowledge. Also outlines the Augoeides working.