Breed to Come
When desperate measures failed to control what men had begun and could not stop, they fled their polluted planet, leaving behind an epidemic virus born of experimentation. Yet unlike men, whom the disease could destroy, the animals of the planet thrived, each generation more forceful and intelligent than the last.
In the ruins of what was once a university complex a vast band of cats, more highly evolved that those on the outside, sought to master the works of man. And they learned that the Demons - as men were called - were not legendary, but real, as was the danger of their return to the planet.
Then one day a spaceship landed bearing the feared exile race.
Andre Norton
Andre Alice Norton (1912-2005) was an American science fiction and fantasy author (with some works of historical fiction and contemporary fiction) under the noms de plume Andre Norton, Andrew North and Allen Weston. Norton published her first novel in 1934, and was the first woman to receive the Gandalf Grand Master Award from the World Science Fiction Society in 1977, and won the Damon Knight Memorial Grand Master Award from the Science Fiction and Fantasy Writers of America (SFWA) association in 1983.