Octavia E. Butler

The complete series about an alien species that could save humanity after nuclear apocalypse—or destroy it—from "one of science fiction's finest writers" (The New York Times).
The newest stage in human evolution begins in outer space. Survivors of a cataclysmic nuclear war awake to find themselves being studied by the Oankali, tentacle-covered galactic travelers whose benevolent appearance hides their surprising plan...