This book, the second in the so-called "Smiley versus Karla" trilogy, is bar none, Le Carre's best novel. It is about a complicated ploy by George Smiley, now re-instated in the circus and it's new head, to gain revenge on Karla and Moscow Centre over it's decades long humiliation by the hands of a British spy. The novel is primarily based in the far east, mainly in Hong Kong and reaching out to war-torn Cambodia. The man on the scene, set to land the coup, is Jerry Westerby, a sometime news Reporter, a some time spy for the circus. Unfortunately for him, the cards are stacked against him from the outset. I would read Tinker Tailor before reading this novel, so as to have much of the background knowledge needed. But in my mind this is LeCarre's finest work. Pity the excellent Tinker Tailor Soldier Spy, and Smiley's People didn't have this gem filmed along with them as well.