Wartime spies

"A historical account of espionage during World War I, including famous spies such as Mata Hari, covert missions, and technologies that influenced the course of the conflict"--

"A historical account of espionage during the American Civil War, including famous spies such as Elizabeth Van Lew, covert missions, and technologies that influenced the course of the conflict"--

"An account of espionage during the modern age, including famous spies such as Dayna Williamson Baer, covert missions, and technologies that influence the course of present-day conflicts"--