Don Karr (BFA RISD 1974, MFA Cornell 1976) is co-author of two books in the acclaimed series, Sourceworks of Ceremonial Magic: with Stephen Skinner, Sepher Raziel: Liber Salomonis, a Sixteenth-century English Grimoire (Singapore: Golden Hoard Press, 2010; second edition [paperback], 2018), and with Calanit Nachshon, Liber Lunæ - Book of the Moon - Sepher ha-Levanah (Singapore: Golden Hoard Press, 2011; second edition [paperback], 2017). Don also published the pioneering Approaching the Kabbalah of Maat (York Beach: Black Jackal Press, 2013), which contains a foreword by Colin Low; this is supplemented by Methods of Maat (forthcoming). Don is the author of numerous articles on Jewish mysticism and its influence on the Western esoteric tradition which can be found online at Hermetic Kabbalah, edited by Colin Low, at www.digital-brilliance.com ("Bibliographies" and "Contributed Documents") and at Academia.edu Don Karr - Academia.edu. Cliff Pollick has been an almost life-long practitioner of Western esotericism and ritual practice including Neo Paganism, the OTO and Golden Dawn traditions. He is also a Sri Vidya upasaka of a South Indian Kaula Sampradaya. Sacred Geometry and the science of sound are particular interests he has pursued. Recently retired from a 49 year Career in Nursing covering neurosurgical and coronary intensive care to Psychiatry and Dementia care. He lives on the Olympic Peninsula of Washington with his beloved Wife, High Priestess and Shakti, where he finally has time for his music and to catch up on the ever expanding stack of books.