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About the book

*** The Sunday Times bestseller ***

'Vividly imagined and prodigiously researched' Helen Davies, Sunday Times, Books of the Year

'Such a rewarding read' John Preston, Daily Mail, Books of the Year

'This odd, secretive man is brought to life', Robbie Millen, The Times, Books of the Year

Maxwell Knight was a paradox. A jazz obsessive and nature enthusiast (he is the author of the definitive work on how to look after a gorilla), he is seen today as one of MI5's greatest spymasters, a man who did more than any other to break up British fascism during the Second World War - in spite of having once belonged to the British Fascisti himself. He was known to his agents and colleagues simply as M,...