Espionage
An early example of espionage literature is Kim by the English novelist Rudyard Kipling, with a description of the training of an intelligence agent in the Great Game between the UK and Russia in 19th century Central Asia. An even earlier work was James Fenimore Cooper's classic novel, The Spy, written in 1821, about an American spy in New York during the Revolutionary War.
During the many 20th-century spy scandals, much information became publicly known about national spy agencies and dozens of real-life secret agents. These sensational stories piqued public interest in a profession largely off-limits to human interest news reporting, a natural consequence of the secrecy inherent in their work. To fill in the blanks, the popular conception of the secret agent has been formed largely by 20th and 21st-century fiction and film. Attractive and sociable real-life agents such as Valerie Plame find little employment in serious fiction, however. The fictional secret agent is more often a loner, sometimes amoral—an existential hero operating outside the everyday constraints of society. Loner spy personalities may have been a stereotype of convenience for authors who already knew how to write loner private investigator characters that sold well from the 1920s to the present.
Johnny Fedora achieved popularity as a fictional agent of early Cold War espionage, but James Bond is the most commercially successful of the many spy characters created by intelligence insiders during that struggle. Other fictional agents include Le Carré's George Smiley, and Harry Palmer as played by Michael Caine.
Jumping on the spy bandwagon, other writers also started writing about spy fiction featuring female spies as protagonists, such as The Baroness, which has more graphic action and sex, as compared to other novels featuring male protagonists.
Spy fiction has permeated the video game world as well, in games such as Perfect Dark, GoldenEye 007, No One Lives Forever, and the Metal Gear series.
Espionage has also made its way into comedy depictions. The 1960s TV series Get Smart, the 1983 Finnish film Agent 000 and the Deadly Curves, and Johnny English film trilogy portrays an inept spy, while the 1985 movie Spies Like Us depicts a pair of none-too-bright men sent to the Soviet Union to investigate a missile.
The historical novel The Emperor and the Spy highlights the adventurous life of U.S. Colonel Sidney Forrester Mashbir, who during the 1920s and 1930s attempted to prevent war with Japan, and when war did erupt, he became General MacArthur's top advisor in the Pacific Theater of World War Two.
Black Widow is also a fictional agent who was introduced as a Russian spy, an antagonist of the superhero Iron Man. She later became an agent of the fictional spy agency S.H.I.E.L.D. and a member of the superhero team the Avengers.

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Works cited: Johnson, John (1997). The Evolution of British Sigint, 1653–1939. London: HMSO. OCLC 52130886.
Winkler, Jonathan Reed (July 2009). "Information Warfare in World War I". The Journal of Military History. 73 (3): 845–867. doi:10.1353/jmh.0.0324. ISSN 1543-7795. S2CID 201749182.

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External links: 
History of an espionage in Russia