"Based in part upon the author's sixteen years of U.S. intelligence work and his own Cold War experiences in Hungary after World War II, this now classic insider's look at international intelligence and secret operations explores the nature, principles, and techniques of international undercover operations. The author includes analyses of how they work and how well the United States - and the other major players - carry them out.

This fourth edition has been updated to include a substantial new afterword featuring revelations on Raoul Wallenberg's fate, the author's reminiscences of British turncoat Kim Philby, and much more."--BOOK JACKET.