The Starship Century anthology, Symposium edition, is currently available in paperback for $28 — click here.  (The ebook edition is coming in August.)

Starship Century: Toward the Grandest Horizon is a 340-page partnership between authors from both science and fiction writing backgrounds to illustrate what it will take to travel to another star within the next century.

Edited by Gregory Benford, New York Times bestselling science fiction author, and James Benford, leading expert on space propulsion, Starship Century includes science fiction by Neal Stephenson, David Brin, Joe Haldeman, Nancy Kress, Stephen Baxter, Gregory Benford, John Cramer, Richard A. Lovett, and Allen Steele, as well as scientific articles by Stephen Hawking, Freeman Dyson, Robert Zubrin, Peter Schwartz, Martin Rees, Ian Crawford, James Benford, Geoffrey Landis, Paul Davies and Adam Crowl.
This groundbreaking anthology of science and science fiction is based on findings and discussions of the 100-Year Starship Symposium held in 2011. In it, top scientists tackle the opportunities for our long-term future in space. Alongside them, science fiction authors explore the dream and the possibilities.