The Science of Liberty: Democracy, Reason, and the Laws of Nature (Unabridged)
2011
Murmurs of Earth: The Voyager Interstellar Record (Unabridged)
2017
Perfectly Reasonable Deviations From the Beaten Track : The Letters of Richard P. Feynman
2008
Life beyond Earth
2001
Seeing in the Dark
2002
The Red Limit
1997