Peter Levenda is an author of esoterica and historical investigation, from "Unholy Alliance: A History of Nazi Involvement with the Occult" (foreword by Norman Mailer) and his most recent "Ratline: Soviet Spies, Nazi Priests and the Disappearance of Adolf Hitler," to the more specifically esoteric such as "Tantric Temples: Eros and Magic in Java and Stairway to Heaven: Chinese Alchemists, Jewish Kabbalists and the Art of Spiritual Transformation." In addition, his Sinister Forces trilogy bears forewords by investigative journalists Jim Hougan, Dick Russell and Paul Krassner. He has appeared numerous times as an expert on Nazi occult beliefs on the History Channel, the Discovery Channel, the National Geographic Channel, and TNT, in shows ranging from Brad Meltzer's "Decoded" to "The Nostradamus Effect."