Octavia E Butler

"Since a nuclear war decimated the human population, the remaining humans began to rebuild their future by interbreeding with an alien race -- the Oankali -- who saved them from near-certain extinction. The Oankalis' greatest skill lies in the species' ability to constantly adapt and evolve, a process that is guided by their third sex, the ooloi, who are able to read and mutate genetic code. Now, for the first time in the humans' relationship with...