Shadow of Shadows

The debriefing of Russian defector Colonel Petrov is nearly over, when
suddenly he dries up. SIS agent James Lawler has to find out why, but
Petrov will only say he is scared of being killed - like British double-agent
George Blake.

But Blake had escaped to Russia, alive. Or had he? To uncover the deadly
truth, Lawler has to delve into the murky, intricate past of a traitor and learn
the explosive ...