The plotline for the book The Soldier Spies?

Book III, The Soldier Spies

Winter, 1942. Canidy and Fulmar set up and run a spy pipeline. Their mission is so covert that even they aren't aware of its ultimate goal: to extract-or eliminate-those Germans with the expertise to develop the atomic bomb. It's an against-all-odds assignment, riddled with unpleasant tasks. As the OSS's ruthless and calculating top control agent tells Canidy: "There's an especially unpleasant room in hell waiting for people like me and you."