The Billion Dollar Spy by David E. Hoffman

The Billion Dollar Spy: A True Story of Cold War Espionage and Betrayal by David E. Hoffman -312 pages

Adolph Tolkachev was a Moscow-based engineer specializing in radar systems for the Soviet military who began spying for the C.I.A. in 1978. He was motivated by the oppressive communist regime and its empty slogans of a better future. After several unsuccessful attempts to contact the C.I.A.'s Moscow station, he began passing technical information that saved the U.S. billions in research costs in countering Soviet radar and aircraft development. He was not discovered by Soviet authorities, but betrayed by a former C.I.A. employee. The author thoroughly covers the craft of espionage, and leaves a sense of admiration for a man who was not a traitor, but a Russian patriot.