"In 2008, almost two decades after the Cold War was officially consigned to the history books, an average American guy in his twenties helped to bring down a top Russian spy based at the United Nations. This American had no formal espionage training. Everything he knew about spying he'd learned from books, movies, video games, and TV. And yet, with the help of an initially reluctant FBI duo, he ended up at the center of a highly successful counterintelligence...