
Empire Star is a 1966 science fiction novella by Samuel R. Delany. It is often published together with another book, most frequently with The Ballad of Beta-2. Delany hoped to have it first published as part of an Ace Double with Babel-17, but instead it was published with Tree Lord of Imeten by Tom Purdom. It was finally bundled with Babel-17 in a 2001 reprint.
If I recall, there is a book about this. Samuel Delany, Empire Star. Absolutely phenomenal. From an amazon review: "The best way to describe the book is to say that it is the literary equivalent of an M.C. Escher print."
http://www.amazon.com/Empire-Star-Samuel-R-Delany/dp/0553234...
