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On the Origin of Species, 6th Edition

On the Origin of Species, 6th Edition

by Charles Darwin

Charles Darwin's On the Origin of Species, in which he writes of his theories of evolution by natural selection, is one of the most important works of scientific study ever published.

An Inquiry into the Nature and Causes of the Wealth of Nations

An Inquiry into the Nature and Causes of the Wealth of Nations

by Adam Smith

Adam Smith's masterpiece, first published in 1776, is the foundation of modern economic thought and remains the single most important account of the rise of, and the principles behind, modern capitalism. Wri...

The Einstein Theory of Relativity

The Einstein Theory of Relativity

by Hendrik Antoon Lorentz

Whether it is true or not that not more than twelve persons in all the world are able to understand Einstein's Theory, it is nevertheless a fact that there is a constant demand for information about this muc...

Flatland: A Romance of Many Dimensions

Flatland: A Romance of Many Dimensions

by Edwin Abbott Abbott

Flatland: A Romance of Many Dimensions is an 1884 science fiction novella by the English schoolmaster Edwin Abbott Abbott. As a satire, Flatland offered pointed observations on the social hierarchy of Victo...

Mysticism and Logic and Other Essays

Mysticism and Logic and Other Essays

by Bertrand Russell

Essays on philosophy, religion, science, and mathematics.

Eugenics and Other Evils

Eugenics and Other Evils

by Gilbert Keith Chesterton

From the introduction: "I publish these essays at the present time for a particular reason connected with the present situation; a reason which I should like briefly to emphasise and make clear. Though mos...