A legend among sci-fi readers, C. J. Cherryh's Union-Alliance novels, while separate and complete in themselves, are part of a much larger tapestry—a future history spanning 5,000 years of human civilization.

Here is the 20th anniversary edition of Downbelow Station, the book that won Cherryh a Hugo Award for Best novel in 1982. A blockbuster space opera of the rebellion between Earth and its far-flung colonies, it is a classic science fiction masterwork.