APRIL 1945: From the ruins of Berlin, a Luftwaffe transport plane takes off carrying secret papers belonging to Adolf Hitler. Half an hour later, it crashes in flames.

APRIL 1983: In a bank vault in Switzerland, a German magazine offers to sell more than 50 volumes of Hitler's secret diaries. The asking price is $4 million.

40 years from the alleged discovery, Robert Harris chronicles the gripping tale of one of the biggest frauds in history.