Another one of LeCarre's classic spy novels. The hero is Smiley, a wonderfully understated British spy. His approach to concealing his intentions and not giving info away is to always be completely gray and benignly bland. He goes through the novel not raising his voice, asking a series of mostly friendly and harmless questions, and politely mirroring the people he comes in contact with. And at the end he has penetrated to the heart of the conspiracy and woven an unbreakable net around his target. Has one of the most nearly happy endings in any of LeCarre's books.