Clay's Ark, by Octavia E. Butler
An innocent familiy, carjacked on a desolate highway, is abducted to a bizarre new world. A world being born in the Californian desert.
They discover Earth has been invaded by an alien microorganism. The deadly entity attacks like a virus, but survivors of the disease genetically bond with it, developing amazing powers, near-immortality, unnatural desires - and a need to spread the contagion and create a secret colony of the transformed. Now the meaning of "survival" changes. For the babies born in the colony are clearly, undeniably, not human.
Used. Acceptable condition. Some wear and tear, particularly on the corners of the book. Pages are yellowed.