Mexico Set
by Len Deighton
The story begins in Mexico, where Samson is on the trail of his Soviet opposite number: Erich Stinnes, a KGB major working in East Germany whom London Central wishes to coax over to the West.
The task of laying the delicate and elaborate groundwork for Stinnes' defection propels Samson from Mexico to London, Paris, Berlin, and the East-West border. What happens along the way—a temporary abduction, an unnecessary murder, an inconvenient suicide—happens so fast that Samson hardly seems able to keep London Central informed of developments. Or is it that Samson wants to keep his colleagues in the dark? Certainly London Central's entire senior staff—from Samson's immediate supervisors, locked in their endless internecine office warfare, to the dotty Director-General himself—would have reason to suspect that Samson might be working for the other side. He was, after all, closer than any of the other to the former traitor-in-their-midst.
And Samson himself is losing control—indeed, events seem to be controlling him. As he finds himself in a series of ever more incriminating positions, as one by one the avenues of escape or vindication close before him, the novel winds back toward Mexico.. and toward the astonishing climax - at the scene of the defection Samson has so painstakingly orchestrated—in which the allegiances of all involved are finally and fatefully revealed.