During the American Revolution, espionage was critical to the successes and failures of both Continental and British efforts, and those employed in cloakand- dagger operations always risked death. While the most notorious episode of spying during the war--the Benedict Arnold affair--was a failure, most intelligence operations succeeded. In Invisible Ink: Spycraft of the American Revolution, award-winning author John A. Nagy describes the various techniques used by spies on both sides of the war to exchange secret information and analyzes some of the key spy rings operating during the war. Based on nearly two decades of primary research, including the author's discovery of previously unrecognized spies and methods, Invisible Ink is a major contribution to the history of conflict and technology.
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