'Addictive and deeply moving' Independent'Utterly gripping' Anthony Beevor, Daily Telegraph'Enthralling ... A reminder that heroism can be found in the most unlikely places' Evening Standard'I have seldom enjoyed a spy story more than this one' Max Hastings, Sunday Times_____________________D-Day, 6 June 1944, the turning point of the Second World War, was a victory of arms. But it was also a triu...