Holger Kalweit is a German ethnologist and psychologist who has studied shamanism in Hawaii, the American Southwest, Mexico, and Tibet. He is the author of several books in German as well as the founder of two psychotherapy methods-Darkness Therapy and Nature Psychotherapy-that draw upon shamanic elements.
* This masterful book draws a line in the scientific sand: step over it and be changed. - Larry Dossey,.D., author of Reinventing Medicine