J Marvin Spiegelman has a Ph.D. from UCLA and is a Diplomate in clinical psychology, American Board of Professional Psychology. He is a graduate of the C. G. Jung Institute in Zurich, Switzerland and has taught at UCLA, USC and the Hebrew University in Jerusalem. He is the author, co-author and editor of many books. He has a private practice as a Jungian analyst in Studio City, California.

Christopher S Hyatt, Ph.D. was trained in both psycho-physiology and clinical psychology and practised as a psychotherapist for many years. He has published many articles in peer-reviewed, professional journals. Today he is known as the world-famous author of a wide variety of books on psychology, sex, tantra, tarot, self-transformation and Western magic.