FourDay Planet Author:H. Beam Piper Fenris isn't a hell planet, but it's nobody's heaven either. With 2,000-hour days and an 8,000-hour year, it subjects its settlers to both melting heat and killing cold. A planet like that tends to breed a special kind of person, someone who can tolerate a life underground, or underwater, where he can earn enough to make it all worthwhile. ... more » But when that kind of person discovers he's being cheated of the wealth he's risked his life for, then that kind of planet is ripe for a revolution.« less