The Iron Cage: Johnny has always loved and been protected by the People, bearlike inhabitants of the planet he calls home. When a human starship arrives, intending to exploit the People, Johnny must choose between loyalty to the creatures he considers family and his desire to connect with his long-lost human heritage.
Breed to Come: Humans polluted the Earth and departed, leaving their pets behind on a blasted world. From that devastated past, a new breed of intelligence arose: the felinoid People. Now humans have returned, but the People are in no mood to deal once again with the creatures who abandoned them so long ago.
Omnibus, 533 pages, Mass Market Paperback, Reprint (originally published in 1974 / 1972)