Our Game — John Le Carre

With the Cold War fought and won, British spymaster Tim Cranmer accepts early retirement to rural England and a new life with his alluring young mistress Emma. But when both Emma and Cranmer's star double agent and lifelong rival, Larry Pettifer, disappear, Cranmer is suddenly on the run, searching for his brilliant protégé, desperately eluding his former colleagues, in a frantic journey across Europe and into the lawless, battered landscapes of Moscow and southern Russia, to save whatever of his life he has left....