Heroes to some, traitors to others, spies and intelligence officers continue to fascinate and enthral us with their abilities to operate secretly in the shadows. With these mini-biographies of twenty agents of various nationalities (including members of the DGSE, KGB, CIA, MI6 and Mossad), Patrick Pesnot and 'Mr X' bring the reader as close as possible into the world of espionage, though a panorama of intelligence history. Among the best known of these agents, the reader will find Aldrich Ames, an American accused of spying for the KGB; Eli Cohen, the Israeli spy best known for his espionage work in Syria and Klaus Fuchs, the German-born British agent who helped the USSR to manufacture its atomic bomb in 1949.