The Valhalla ExchangeThe electrifying WWII bestseller from the master of the game. On the 30th April 1945, Russian radar reported a light aircraft leaving the vicinity of the Tiergarten in Berlin. But who was on board, and where was the plane going? Berlin was in ruins as the Russians moved relentlessly towards the concrete bunker where the Nazi adminstration was in ruins. But one man, Reichsleiter Martin Bormann, Adolf Hitlers secretary and eminence grise had a daring