The Eerie Silence: Renewing Our Search for Alien Intelligence

Rare Earth: Why Complex Life is Uncommon in the Universe

The Goldilocks Enigma: Why Is the Universe Just Right for Life?

Life in Space: Astrobiology for Everyone

Contact

If the Universe Is Teeming with Aliens ... WHERE IS EVERYBODY?: Fifty Solutions to the Fermi Paradox and the Problem of Extraterrestrial Life

If the Universe Is Teeming with Aliens ... WHERE IS EVERYBODY?: Seventy-Five Solutions to the Fermi Paradox and the Problem of Extraterrestrial Life (Science and Fiction)

The FIFTH MIRACLE: The Search for the Origin and Meaning of Life

The Impact of Discovering Life beyond Earth

Confessions of an Alien Hunter: A Scientist's Search for Extraterrestrial Intelligence

Astrobiology: A Very Short Introduction (Very Short Introductions)