Faint Echoes, Distant Stars: The Science and Politics of Finding Life Beyond Earth (Unabridged)
2010
Gateways: Original New Stories Inspired by Frederik Pohl (Unabridged)
2025
Pluto (The Outer Planets Trilogy)
2026
Mars Life (The Grand Tour Series)
2008
Orion: Orion Series, Book 1 (Unabridged)
2010
Orion and King Arthur (Unabridged)
2011