Stanislav Grof, MD, is a psychiatrist with over sixty years of research experience in non-ordinary states of consciousness and one of the founders and chief theoreticians of transpersonal psychology. He codeveloped Holotropic Breathwork, an innovative form of experiential psychotherapy that is now used worldwide.
Michael Butler Murray is a professional actor, narrator, and musician who has voiced over fifty-five audiobooks. His recorded titles run the spectrum from dramatic to comedic fiction and nonfiction titles varying in topics from the Middle East to understanding your dog's olfactory senses.