In George Washington's day, spies relied on secret signals and invisible inks that would probably amuse 21st century children. Spies today must employ sophisticated technologies, such as remote sensing and satellite surveillance. Using 40 case histories, Owen tracks the spies and the tools of their trade to reveal the furtive history of espionage. From five vantage points--human agents on the ground, signal intelligence involving decryption of messages, electronic surveillance, misinformation and double agents, and airborne surveillance--Owen details all aspects of intelligence and information-gathering techniques employed during the past 100 years. The book is loaded with pictures and illustrations. Firefly, 2002, 224 p., b&w/color photos/illus., paperback, $24.95.
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