On 21 April, 1945, in the hamlet of Börnersdorf, Eastern Germany, a Junkers plane plummets from the sky. It crashes and bursts into flames. A few iron boxes are salvaged from the wreckage. Rumour spreads that Hitler’s personal effects are in those boxes. Could there have been diaries?In the decades that follow, a trade in Nazi memorabilia springs up where genuine documents and fakes cross hands,… 