Alien Earths: The New Science of Planet Hunting in the Cosmos: Kaltenegger, Dr. Lisa: 9781250283634: Amazon.com: Books
Billions & Billions: Thoughts on Life and Death at the Brink of the Millennium: Sagan, Carl, Ojo, Adenrele, Druyan, Ann: 9781531888527: Amazon.com: Books
Cosmos 1st edition by Sagan, Carl (1980) Hardcover: Carl Sagan: Amazon.com: Books
Cosmic Connection: An Extraterrestrial Perspective: Carl Sagan, Jerome Agel: 9780440133018: Amazon.com: Books