Bernard Samson suspects there is a traitor within his department of MI6. A jaded but highly skilled British intelligence agent nearing the end of his career, Samson already got KGB major Eric Stinnes to defect. But when a British KGB agent makes a sweeping confession with a suspicious undertone, the finger points straight back to London—where Stinnes is locked up, refusing to talk.

The spy who’s in the clear doesn’t exist. In the spectacular third novel in Len Deighton’s Game, Set, Match trilogy, will Samson make the winning move?