The Sinkiang Executive: Quiller, Book 8

In the eighth Quiller suspense novel, the British agent finds himself once again playing a lone cool hand, and this time his superiors don't expect him to return alive--nor do they much care!

Having rashly paid off an old personal debt by eliminating a Russian operative, Quiller learns that the price of his vengeance is extraordinarily high when he faces summary dismissal. But London will reconsider his "retirement" if he will take one more mission. He has no choice. The target: the frozen wasteland of the Sino-Soviet border. The key to the target: a captured Russian jet fighter. Only by an act of daring and with a lot of luck will Quiller even gain entry into Russian airspace...and no one has bothered to figure how Quiller will get out!