Berlin Game 

Description: 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 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 Centre. 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.