This Virtual Night: Outworlds, Book 2 - C. S. Friedman

Returning to the universe of New York Times Notable book This Alien Shore comes a new space opera from an acknowledged master of science fiction. When deep-space travel altered the genes of the first interstellar colonists, Earth abandoned them. But some of the colonies survived, and a new civilization of mental and physical “Variants” has been established, centered around clusters of space stations known as the outworlds.