Ground Zero Man was revised and published as The Peace Machine in 1985.
Hutchman was an ordinary man, doing his job, devising rocketry guidance systems. Life held its satisfactions and its frustrations. He had no spectacular ambitions. Then one day, Hutchman discovered that he could destroy the world - or save it, and destroy himself.
There was no other way. But the masters of the earth didn't want it saved Hutchman's way. They wanted Hutchman destroyed along with his doomsday device. And so the chase was on. Hutchman had succeeded in one thing, at least - he had brought about unity among the world's powers. They all wanted him dead!