The enduring appeal of spies and their technology, codes and mysterious ways are explored in this engaging series of four colorful books. Each explores a different aspect of the spy trade, interspersing historical tidbits with tales of spies from popular culture and contemporary movies. Other titles in this series include: "Codes and Ciphers," "Spy School," and "Top Technology."

John Le Carre, Sir Francis Walsingham, Mata Hari, Moe Berg, J. Edgar Hoover, Ian Fleming and Stella Rimington, along with several of the most high-profile spy exchanges, captures and escapes are covered in "Secret Agents."