Tinker, Tailor, Soldier, Spy (George Smiley Series #5)

From the New York Times bestselling author of A Legacy of Spies. 

The man he knew as "Control" is dead, and the young Turks who forced him out now run the Circus. But George Smiley isn't quite ready for retirement—especially when a pretty, would-be defector surfaces with a shocking accusation: a Soviet mole has penetrated the highest level of British Intelligence. Relying only on his wits and a small, loyal cadre, Smiley recognizes the hand of Karla—his Moscow Centre nemesis—and sets a trap to catch the traitor.
 
The Oscar-nominated feature film adaptation of Tinker Tailor Soldier Spy is directed by Tomas Alfredson (Let the Right One In) and features Gary Oldman as Smiley, Academy Award winner Colin Firth (The King's Speech), and Tom Hardy (Inception).
 
With an introduction by the author.