The Twenty Planets Universe
- Halfway Human (novel), Avon, 1998; Reprinted by Arc Manor, 2010
- Arkfall (novella), Phoenix Pick, Arc Manor Publishers, 2010
- The Ice Owl (novella), Arc Manor Publishers, 2012
- Dark Orbit (novel), Tor, 2015
- Testament of Leaves (novella), Fairwood Press, 2026
The Forsaken Isles
- Isles of the Forsaken (novel), ChiZine Publications, 2011
- Ison of the Isles (novel), ChiZine Publications, 2012
Collections
- Candle in a Bottle (novella), Aqueduct Press, 2006
- Aliens of the Heart (short story collection), Aqueduct Press, 2007