Tool of the Trade — Joe Haldeman

Meet Nicholas Foley--distinguished professor, loving husband, model citizen.

Meet Nicholas Foley--KGB mole, a man living a dangerous lie behind the smooth facade of a manufactured American identity.

Meet Nicholas Foley--secret inventor of an awesome device that gives him ultimate control over the human mind!

Now, as his KGB masters try to activate him, Foley must decide which side he is really on--and who will have access to his device and the mind-boggling power it can wield--for the good of humanity...or for its ultimate destruction.