The word Quisling has been used as a synonym for traitor or treachery. The original Vidkun Quisling (1887-1945) was a gifted Norwegian army officer who sided with the Nazis on the first day of Norway's entry into the Second World War. Dahl's biography is the first to use a complete range of source material from Nordic, German, Italian and Russian archives, and family archives now in the United States tracing Quisling's career through to the drama...