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.

S. Jason Black is a professional writer and artist and a life-long student and practitioner of Magic and Tantra. He has worked as a professional psychic, much sought after for his accuracy.