Intelligent Life in the Universe
S. Shklovskii & Carl Sagan
UFO's: A Scientific Debate
Carl Sagan & Thornton Page (eds.)
A Path Where No Man Thought
Carl Sagan & Richard Turco
Cosmos
Carl Sagan
Other Worlds
Billions & Billions
Shadows of Forgotten Ancestors
Pale Blue Dot
The Dragons of Eden
The Demon-Haunted World
Comet, Revised
Broca's Brain
The Varieties of Scientific Experience
Murmurs of Earth
Cosmic Connection: An Extraterrestrial Perspective [1973, 1975]
Contact