by DOUGLAS R. MASON
Popular Library #52-599. From rear cover: "For 7,000 years the domed city of Carthage has protected its citizens from the ice-covered world outside. But now Gaul Kalmar, a brilliant engineer, discovers that the entire planet is habitable. Tormented by the dehumanized tyranny of life in Carthage, he enlists the aid of seven other rebels in a desperate attempt to escape."