Heinlein's monumental "Future History" series continues. Two scientists develop cheap solar power-and threaten the industrial status quo. The nation's cities are linked by a system of moving roads-and a strike can bring the entire country to a halt. Workers in an experimental atomic plant crack under the mental strain. And the space frontier is opened by an unlikely hero-D. D. Harriman, a billionaire with a dream: the dream of Space for All Mankind. The method? Anything that works. Maybe, in fact, Harriman goes too far. But he will give us the stars. . .