The aliens came to Earth not for conquest, but simply to create a war and watch it played out by humans. But they are prohibited from using any technology not developed on the planet--and 20th-century armaments are too primitive for good sport. The answer? To persuade the Air Force Chief of Staff to found a think-tank group under their secret guidance for the development of 22nd-century technology. If Jan Ambers, an electronics expert-turned-warrior, cannot stop them, the result will be global devastation.
Used availability for John Dalmas's The Playmasters
January 1987 : USA Paperback