CARL SAGAN (1934–1996) was an American astronomer, planetary scientist, cosmologist, astrophysicist, astrobiologist, and bestselling author.  A popular and influential figure, he was controversial in scientific, political, and religious circles for his views on extraterrestrial intelligence, nuclear weapons, and religion.

His early work focused on the physical conditions of the planets, especially the atmospheres of Venus and Jupiter.  His best known scientific contribution is research on extraterrestrial life, including experimental demonstration of the production of amino acids from basic chemicals by radiation.  Sagan assembled the first physical messages sent into space: the Pioneer plaque and the Voyager Golden Record, universal messages that could potentially be understood by any extraterrestrial intelligence that might find them.

Sagan arguably did more to popularize science than any person on the planet, investing much of his career in improving public understanding of science and sharing his wonder and fascination with the mysteries of the universe with millions.  He reached the height of his public fame in 1980 with the award-winning television series COSMOS. The accompanying book, with the same title, became a best seller.  It was followed by several other books, including the science-fiction novel CONTACT (1985) and PALE BLUE DOT: A VISION OF THE HUMAN FUTURE IN SPACE (1994).

Sagan sometimes used his prestige for political purposes, as in his campaign for nuclear disarmament and his opposition to Ronald Reagan's Strategic Defense Initiative.  In 1983 he cowrote the paper that introduced the concept of “nuclear winter,” a catastrophic global cooling that would result from a nuclear war.  Sagan was also coauthor of THE COLD AND THE DARK: THE WORLD AFTER NUCLEAR WAR (1984).  A tireless advocate of scientific rationality, he argued strongly against tendencies toward pseudoscience and occultism, most comprehensively in his last major book, THE DEMON-HAUNTED WORLD (1996).

He received numerous awards and honours, including the Pulitzer Prize for THE DRAGONS OF EDEN (1977), the NASA Distinguished Public Service Medal (1977 and 1981), and the Ørsted Medal from the American Association of Physics Teachers in 1990.  In 1994 he was awarded the Public Welfare Medal by the National Academy of Sciences.

In addition to the books below, this torrent includes some 80 unitemized scientific papers and articles originally published in academic journals.


The following books are in ePUB format unless otherwise noted:

== NON-FICTION ==

* A Path Where No Man Thought [with R. Turco] (Random House, 1990) — PDF
* Billions & Billions: Thoughts on Life at Brink of the Millennium (Ballantine, 2011)
* Broca's Brain: Reflections on the Romance of Science (Ballantine, 2011)
* Cold and the Dark: The World after Nuclear War [contrib.] (Norton, 1984) — PDF
* Comet [with A. Druyan] (Ballantine, 2011)
* Conversations with Carl Sagan (Mississippi, 2006).  T. Head, ed. — PDF
* Cosmic Connection: An Extraterrestrial Perspective (Dell, 1975) — ePUB + PDF
* Cosmos (Ballantine, 1984)
* Cosmos (Random House, 1980). Full color illustrated edition — PDF
* Cosmos (Ballantine, 2011). New foreword by Neil deGrasse Tyson.
* Demon-Haunted World, The: Science as a Candle in the Dark (Ballantine, 2011)
* Dragons of Eden: Speculations on the Evolution of Intelligence (Ballantine, 2011)
* Intelligent Life in the Universe [with I. Shklovskii] (Holden-Day, 1966) — PDF
* Murmurs of Earth: The Voyager Interstellar Record (Ballantine, 1979)
* Other Worlds (Bantam, 1975) — PDF
* Pale Blue Dot: A Vision of the Human Future in Space (Ballantine, 2011)
* Shadows of Forgotten Ancestors [with A. Druyan] (Ballantine, 2011)
* UFO's: A Scientific Debate (Norton, 1974). C. Sagan and T. Page, eds. — PDF
* Varieties of Scientific Experience, The (Penguin, 2007).  A. Druyan, ed.

== FICTION ==

* Contact: A Novel (Pocket Books, 2016)

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