Berlin Game — Len Deighton

BRAHMS FOUR WANTS OUT

This alarming signal means that one of Britain's most reliable, most valuable agents behind the Iron Curtain is urgently demanding safe passage to the West. It sends a ripple of panic through the highest levels of the British secret service. Appropriately, it has fallen to Bernard Samson, himself once active in the field, but now anchored behind a London desk, to undertake the crucial rescue.

But even before Samson sets out on his mission, he is confronted with inescapable evidence that there is a traitor among his colleagues--a traitor planted by Moscow Center. To discover who it is--and why--Samson must sift through layers of lies and follow a web of treachery from London to Berlin until hero and traitor collide.