Claudia Müller-Ebeling, Ph.D., an art historian and anthropologist, is the coauthor of Shamanism and Tantra in the Himalayas and was editor in chief of Dao, a magazine about the health and longevity practices of the Far East. She lives in Hamburg, Germany. Christian Rätsch, Ph.D. (1957 – 2022), was a world-renowned anthropologist and ethnopharmacologist who specialized in the shamanic uses of plants. He is the author of The Encyclopedia of Psychoactive Plants and Marijuana Medicine, and coauthor of Plants of the Gods and Shamanism and Tantra in the Himalayas. He lived in Hamburg, Germany, and lectured around the world. Wolf-Dieter Storl is a cultural anthropologist and ethnobotanist who has taught at Kent State University, as well as in Vienna, Berne, and Benares. He lives in Allgäu, Germany, and is the author of Culture and Horticulture: A Philosophy of Gardening.