No doubt remains; a mole has infiltrated the highest level of the Circus, code name for British Secret Intelligence Service. Sidelined agent George Smiley is covertly tapped to root out the traitor-a task that requires an intensive dig through the labyrinths of Cold War espionage and his own past. Available for purchase at http://acornonline.com/tinker%2c-tailor%2c-soldier%2c-spy/p/tinker-tailor-soldier-spy/