Otto Rahn and the Quest for the Grail: The Amazing Life of the Real Indiana Jones

Who was the amazing Otto Rahn? How come if Rahn was such an amazing man has hardly anyone outside specialist pre-WW2 history circles ever heard of him? But is he really such an unknown? The story lines of Raiders of the Lost Ark to Indiana Jones and the Last Crusade mirror Rahn's incredible adventures in the South of France in the early 1930s.