Two scientists have contrived to develop cheap solar power and end up rivaling the highest of industrial standards. The nation`s cities link up by a system of moving roads and a strike can disable the entire country. Workers in an experimental atomic plant crack under pressure, as billionaire D.D. Harriman becomes an unlikely hero with his dream of space for all of mankind. But does he go too far in Robert A. Heinlein`s The Man Who Sold the Moon?