Intelligence in War (2003) By John Keegan
Enigma: the Battle for the Code (2004) By Hugh Sebag-Montefiore
Plunging Point: Intelligence Failures... (2005) By Lance Collins & Warren Reed
A Quiet Courage (1991) By Liane Jones
Betraying Hitler: The Story of Fritz Kolbe, the Most... (2005) By Lucas Delattre
The Big Breach (2001) By Richard Tomlinson
Most Secret War: British Scientific Intelligence 1939-1945 (1985) By R.V. Jones
Sun Tzu's Art of War (1990) By General Tao Hanzhang
Most Secret War (2009) By R.V. Jones
Codebreaker: The History of Secret Communication (2006) By Stephen Pincock
Most Secret War (1979) By R. V. Jones
Camp Z: How British Intelligence Broke Hitler's Deputy (2011) By Stephen McGinty
Hitler's Spies: German Military Intelligence (1978, 1980) By David Kahn
The Ministry of Ungentlemanly Warfare (2016) By Giles Milton
Battle of Wits: The Complete Story of Codebreaking.. (2000) By Stephen Budiansky
Agent Garbo (2012) By Stephan Talty
