The Secret War: Spies, Codes and Guerrillas 1939 - 1945 - Max Hastings

Examining the espionage and intelligence stories in World War II on a global basis, bringing together the British, American, German, Russian and Japanese histories.
In The Secret War, Max Hastings examines the espionage and intelligence machines of all sides in World War II and the impact of spies, code breakers and partisan operations on events.
Written on a global scale, the book brings together accounts from British, American, German, Russian and Japanese sources to tell the story of a secret war waged unceasingly by men and women often far from the battlefields but whose actions profoundly influenced the outcome.
Returning to the Second World War for the first time since his best-selling All Hell Let Loose, Hastings weaves into a 'big picture' framework the human stories of spies and intelligence officers who served their respective masters.
Told through a series of snapshots of key moments, the book looks closely at Soviet espionage operations which dwarfed those of every other belligerent in scale as well as the code-breaking operation at Bletchley Park - the greatest intelligence achievement of the conflict - with many more surprising and unfamiliar tales of treachery, deception, betrayal and incompetence by spies of Axis, Allied or indeterminate loyalty.