A book that does not seem to be among the first-mentioned classics of the genre, and I cannot imagine why. Syncretic presentations of magical philosophy and practice are numerous, borrowing from sources such as this, but this book has the unmistakably organic flow and seamlessness of form and substance that mark a deeply considered and eloquent utterance with the ring of mastery. Not a book in quite the modern style or tone, but in a literate, though unostentatious idiom, that does justice to the matter, and serves as an admirable introduction to the Art for such as would as soon not be spoon-fed with more or less predigested material. As an introduction to this subject likely ought to, it leans rather more to the theoretical and expository than to the practical, but makes the point as well and convincingly as I have ever seen that in this endeavor, "practical" exercise undertaken without a deeper understanding of its meaning, is of limited value. And certainly the book is not all as forbidding as the above might suggest, but a well-flowing and engaging volume. Very recommended to whoever welcomes an intellectually and spiritually rewarding challenge.
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.