Xenogenesis

Dawn: After nuclear war destroys the world, Earths survivors are rescued by the miraculously powerful Oankali aliens- who survive by merging genetically with primitive peoples without their permission. Adulthood Rites: Desperate to regain their world, childless humans seek to cleanse the alien taint by kidnapping hybrid children. But the raiders are blind to the truth of Earths new children. Imago: The futures of both humans and aliens rest in one young beings successful metamorphosis into adulthood