On The Origin of Species by Charles Darwin(1859)

The Origin of Species by Charles Darwin(1997)

Journal of Researches by Charles Darwin(1845)

The Voyage of the Beagle by Charles Darwin(1839)

The Mathematical Principles of Natural Philosophy by Isaac Newton(1687)

Dialogue Concerning the Two Chief World Systems by Galileo Galilei(1632) 

On the Revolutions of Heavenly Spheres by Nicolaus Copernicus(1543)

Physics by Aristotle(c. 350 BC) Translated by Hardie and Gaye(1930)

Relativity - The Special and General Theory by Albert Einstein(1916)

The Selfish Gene by Richard Dawkins(1976)

The Interpretation of Dreams by Sigmund Freud(1900)

One Two Three... Infinity by George Gamow (1947)

The Double Helix by James D. Watson(1968)

What is Life by Erwin Schrodinger(1944)

The Cosmic Connection by Carl Sagan(1973)

On the Fabric of the Human Body by Andreas Vesalius(1543)

The First Three Minutes -A Moderm View of the Origin of the Universe by Steven Weinberg(1977)

Silent Spring by Rachel Carson(1962)

The Mismeasure of Man by Stephen Jay Gould(1981)

The Man Who Mistook His Wife for a Hat and Other Clinical Tales by Oliver Sacks(1985)

The Journals of Lewis and Clark by Meriwether Lewis and William Clark(1814)

The Feynman Lectures on Physics Volumes 1 - 3 by Feynman et al.(1963)

Under a Lucky Star by Roy Chapman Andrews(1943)

Micrographia by Robert Hooke(1665)

Gaia-A New Look at Life on Earth by James Lovelock(1979)

The Varieties of Religious Experience by William James(1902)

The Structure of Scientific Revolutions by Thomas S. Kuhn(1962)

A Brief History Of Time by Stephen Hawking(1988)

Guns, Germs and Steel by Jared Diamond(1997)

The Elegant Universe by Brian Green(1999)