JOHN LISLE is a historian of science and the American intelligence community. He earned a Ph.D. in history from the University of Texas and has taught courses on U.S. history, cyberspace, and information warfare at the University of Texas, Louisiana Tech University, and Austin Community College. His writing has appeared in Scientific American, Smithsonian Magazine, Skeptic, The Journal of Intelligence History, and Physics in Perspective. The Dirty Tricks Department is his first book.