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  • Burning the Ice (Tor Books hc, Aug 2002)
  • Proxies (Tor Books hc, Sep 1998; pb Oct 1999).
  • Greenwar, in collaboration with Steven Gould (Forge Books hc, Jun 1997; Tor Books pb, Nov 1998).
  • Glass Houses (Analog Magazine, Dec 1991; Tor Books pb, May 1992).
  • Astropilots (USA: OMNI/Scholastic pb, Jun 1987; UK: Dragon Books pb, 1987; Japan: Hayakawa Books pb, 1989).

Short fiction

  • “At Tide’s Turning” (Asimov’s, April 2001; Worldmakers, St. Martin’s Press, Dec 2001).
  • “A Dose of Reality” (Wild Cards XIV, Baen Books pb; Mar 1994).
  • “The Lamia’s Tale” (Wild Cards XIII, Baen Books pb; Mar 1993).


  • “Writing on the Edges: The Science in Science Fiction” (The SFWA Bulletin, Jun 1999).
  • “A Pilgrim’s Progress: My Experiments with a New Interactive Storytelling Technology” (The SFWA Bulletin, May 1997).