The Golden Horseshoe: The Wartime Career of Otto Kretschmer, U-Boat AceEbookThe Golden Horseshoe: The Wartime Career of Otto Kretschmer, U-Boat AcebyTerence RobertsonRating: 3 out of 5 stars3/5Save The Golden Horseshoe: The Wartime Career of Otto Kretschmer, U-Boat Ace for later