Sailor, painter, doctor, lawyer, polyglot, and writer, Dmitri Bystrolyotov (1901-75) led a life that might seem far-fetched for a spy novel, yet here the truth is stranger than fiction. The result of a thirty-five-year journey that started with a private meeting between the author and Bystrolyotov in 1973 Moscow and continued through the author's subsequent research in international archives, Stalin's Romeo Spy: The Remarkable Rise and Fall of the...