Mankind under the Leash/ Planet of Exile Author:Thomas M. Disch, Ursula K. LeGuin This is an "Ace Double" publication: Read the first novel and then turn the book over for the second complete novel. — Planet of Exile: The Earth colony of Landin had been stranded on distant Eltanin for ten years. But ten of Eltanin's years were six hundred Terrestial years, and the lonely and dwindling human settlement was beginning to feel ... more »the strain.
Mankind under the Leash: When the alien energy-creatures came to Earth in 1970, mankind tried every weapon it knew against their attack, but they were all useless - for how can you battle beings with enormous power but no solidity? Within a few short years, all of earth was controlled by the Masters, who used men as their pets and playthings. But finally the day came when men had a chance for freedom. And, at the end, the fate of the entire rebellion rested on one man...« less