In the 1930s, Noel Field was an Ivy League-educated American working for the U.S. State Department. This hour, we’ll talk about how Field betrayed his country to become one of Joseph Stalin’s top spies – only to have the tables turned on him by the KGB. We’ll be joined by Kati Marton, who tells the story in “True Believer: Stalin’s Last American Spy” (Simon & Schuster). Marton will be in town Nov. 3 to talk about her book at a World Affairs Council of Dallas-Fort Worth event.