Book excerpt: The History of Espionage recounts the fascinating story of spies and spying from the cloak-and-dagger machinations of the Ancient Greeks and Romans to the high-tech surveillance operations of the post-9/11, post-truth world. It is a tale of clandestine agents, military scouts, captured documents, dead-letter drops, intercepted mail, decoded telegrams, secret codes and ciphers, bugging devices, desperate plots and honey traps. Featuring case studies on the most fascinating spies and plots through history and illustrated with rare photographs throughout, The History of Espionage decodes the sinister world of surveillance like never before.