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Andrew, Christopher. For the President's Eyes Only: Secret Intelligence and the American Presidency from Washington to Bush (1996)
Black, Ian and Morris, Benny Israel's Secret Wars: A History of Israel's Intelligence Services (1991)
Bungert, Heike et al. eds. Secret Intelligence in the Twentieth Century (2003) เก็บถาวร 2012-07-16 ที่ เวย์แบ็กแมชชีน essays by scholars
Dulles, Allen W. The Craft of Intelligence: America's Legendary Spy Master on the Fundamentals of Intelligence Gathering for a Free World (2006)
Kahn, David The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet (1996), 1200 pages
Lerner, K. Lee and Brenda Wilmoth Lerner, eds. Encyclopedia of Espionage, Intelligence and Security (2003), 1100 pages. 850 articles, strongest on technology
Odom, Gen. William E. Fixing Intelligence: For a More Secure America, Second Edition (Yale Nota Bene) (2004)
O'Toole,  George. Honorable Treachery: A History of U.S. Intelligence, Espionage, Covert Action from the American Revolution to the CIA (1991)
Owen, David. Hidden Secrets: A Complete History of Espionage and the Technology Used to Support It (2002), popular
Richelson, Jeffery T. A Century of Spies: Intelligence in the Twentieth Century (1997) เก็บถาวร 2012-07-16 ที่ เวย์แบ็กแมชชีน
Richelson, Jeffery T. The U.S. Intelligence Community (4th ed. 1999)
Shulsky, Abram N. and Schmitt, Gary J. "Silent Warfare: Understanding the World of Intelligence" (3rd ed. 2002), 285 pages
West, Nigel. MI6: British Secret Intelligence Service Operations 1909–1945 (1983)
West, Nigel. Secret War: The Story of SOE, Britain's Wartime Sabotage Organization (1992)
Wohlstetter, Roberta. Pearl Harbor: Warning and Decision (1962)
Beesly, Patrick. Room 40. (1982). Covers the breaking of German codes by RN intelligence, including the Turkish bribe, Zimmermann telegram, and failure at Jutland.
May, Ernest (ed.) Knowing One's Enemies: Intelligence Assessment before the Two World Wars (1984)
Tuchman, Barbara W. The Zimmermann Telegram (1966)
Yardley, Herbert O. American Black Chamber (2004)
Babington Smith, Constance. Air Spy: the Story of Photo Intelligence in World War II (1957) - originally published as Evidence in Camera in the UK
Beesly, Patrick. Very Special Intelligence: the Story of the Admiralty's Operational Intelligence Centre, 1939–1945 (1977)
Hinsley, F. H. British Intelligence in the Second World War (1996) (abridged version of multivolume official history)
Jones, R. V. Most Secret War: British Scientific Intelligence 1939–1945 (2009)
Kahn, David. Hitler's Spies: German Military Intelligence in World War II (1978)
Kahn, David. Seizing the Enigma: the Race to Break the German U-Boat Codes, 1939–1943 (1991)
Kitson, Simon. The Hunt for Nazi Spies: Fighting Espionage in Vichy France, Chicago:  University of Chicago Press, (2008). ISBN 978-0-226-43893-1
Lewin, Ronald. The American Magic: Codes, Ciphers and the Defeat of Japan (1982)
May, Ernest (ed.) Knowing One's Enemies: Intelligence Assessment before the Two World Wars (1984)
Smith, Richard Harris. OSS: the Secret History of America's First Central Intelligence Agency (2005)
Stanley, Roy M. World War II Photo Intelligence (1981)
Wark, Wesley K. The Ultimate Enemy: British Intelligence and Nazi Germany, 1933–1939 (1985)
Wark,  Wesley K. "Cryptographic Innocence: the Origins of Signals Intelligence in Canada in the Second World War", in: Journal of Contemporary History 22 (1987)
Aldrich, Richard J. The Hidden Hand: Britain, America and Cold War Secret Intelligence (2002).
Ambrose, Stephen E. Ike's Spies: Eisenhower and the Intelligence Establishment (1981).
Andrew, Christopher  and Vasili Mitrokhin. The Sword and the Shield: The Mitrokhin Archive and the Secret History of the KGB (1999) เก็บถาวร 2012-07-16 ที่ เวย์แบ็กแมชชีน
Andrew, Christopher, and Oleg Gordievsky. KGB: The Inside Story of Its Foreign Operations from Lenin to Gorbachev (1990).
Bogle, Lori, ed. Cold War Espionage and Spying (2001), essays by scholars
Boiling, Graham. Secret Students on Parade: Cold War Memories of JSSL, CRAIL, PlaneTree, 2005. ISBN 1-84294-169-0
Dorril, Stephen. MI6: Inside the Covert World of Her Majesty's Secret Intelligence Service (2000).
Dziak,  John J. Chekisty: A History of the KGB (1988)
Elliott, Geoffrey and Shukman, Harold. Secret Classrooms. An Untold Story of the Cold War. London, St Ermin’s Press, Revised Edition, 2003. ISBN 1-903608-13-9
Koehler, John O. Stasi: The Untold Story of the East German Secret Police (1999) เก็บถาวร 2012-07-16 ที่ เวย์แบ็กแมชชีน
Ostrovsky, Viktor By Way of Deception (1990)
Persico, Joseph. Casey: The Lives and Secrets of William J. Casey-From the OSS to the CIA (1991)
Prados, John. Presidents' Secret Wars: CIA and Pentagon Covert Operations Since World War II (1996)
Rositzke, Harry. The CIA's Secret Operations: Espionage, Counterespionage, and Covert Action (1988) เก็บถาวร 2012-07-16 ที่ เวย์แบ็กแมชชีน
Trahair, Richard C. S. Encyclopedia of Cold War Espionage, Spies and Secret Operations (2004) เก็บถาวร 2012-07-16 ที่ เวย์แบ็กแมชชีน, by an Australian scholar; contains excellent historiographical introduction
Weinstein, Allen, and Alexander Vassiliev. The Haunted Wood: Soviet Espionage in America—The Stalin Era (1999).