John Geiger

John Grigsby Geiger is a Canadian journalist, author and shipwreck hunter. He is best known for his book The Third Man Factor: Surviving the Impossible, which popularized the concept of the "third man", an incorporeal being that aids people under extreme duress. The book is the basis for a National Geographic Channel video entitled Explorer: The Angel Effect, in which Geiger appears. In turn, a second book on the topic, based on, and taking its name from the National Geographic video, was publi…