Joe Haldeman 
Tool of the Trade [EPUB ebook] 

Nick Foley is on the run. The KGB and CIA are both after him. Not suprising, since he’s a Soviet sleeper whose cover has been blown, but Nick has more than state secrets to hide. If he tells a stranger to drive him a thousand miles, it’ll happen; if he tells a pusher to OD on his own heroin, the pusher will do it.Nick’s strange power is vital to both sides, and neither of them intend to let him keep it to himself, but neither the CIA nor the KGB can imagine Nick’s final, desperate throw of the dice.