The Iron Breed: Andre Norton

Two bestselling novels of science fiction adventure from legendary storyteller Andre Norton collected together for the first time, The Iron Cage and Breed to Come. A young woman and a young man face down powerful enemies as they come of age in a far future universe full of menace and technology so powerful as to be almost magic.
The Iron Cage: Johnny has always loved and been protected by the People, the bearlike inhabitants on the planet he calls home. But when a star ship arrives carrying Johnny's original species, humans-humans who seek to exploit the People for their own ends-Johnny is forced to choose between loyalty to the creatures he considers his family, and the need to reconnect with his long lost heritage.
Breed to Come: On a distant future Earth, humans have polluted the planet and departed, leaving their pets behind to inherit a blasted world. But from that devastated past, a new breed of intelligence arises: the catlike People. Now humans return and the People are in no mood to deal once again with the "demons" who abandoned them to fate so long ago.