The Year's Best Science Fiction: Eighteenth Annual Collection by Steven Utley and Ian McDonald and Peter F. Hamilton and Alastair Reynolds and Eliot Fintushel and Brian M. Stableford and John Kessel and Stephen Baxter and Greg Egan and Charles Stross and Ursula K. Le Guin and Paul McAuley and Rick Cook and Nancy Kress and Ernest Hogan and Tananarive Due and Susan Palwick and Michael Swanwick and Albert E. Cowdrey and M. Shayne Bell and Lucius Shepard and Robert Charles Wilson and Severna Park