In this enlightening new book, former FBI Special Agent William E. Duff offers a gripping portrait of Theodore Stephanovich Mally and the historical and psychological factors that influenced and motivated him. By examining this instrumental yet largely ignored figure, Duff provides a unique glimpse into the rapidly evolving world of prewar Soviet intelligence, its people, and its tradecraft.

William E. Duff is a retired special agent of the FBI who served in the Bureau's foreign counterintelligence department, where he specialized in investigating Soviet and Soviet-bloc espionage.