Return to Mars (The Grand Tour Series)
2008
Mars Life (The Grand Tour Series)
2008
Mars (The Grand Tour Series)
2008
Immortality: How Science is Extending Your Life Span and Changing the World (Unabridged)
2010
Best of Science Fiction and Fantasy (Unabridged)
1991
Faint Echoes, Distant Stars: The Science and Politics of Finding Life Beyond Earth (Unabridged)
2010