Georg Feuerstein, Ph.D., is the author of over 30 books, including "The Yoga Tradition, The Philosophy of Classical Yoga, Holy Madness, Tantra: The Path of Ecstasy, and "Lucid Waking. He is editor in chief of the annual "International Journal of Yoga Therapy and founder and president of the Yoga Research and Education Center.B http: //www.yrec.info/