Published amid a firestorm of controversy in 1859, this is a book that changed the world. Reasoned and well-documented in its arguments, it offers coherent views of natural selection, adaptation, the struggle for existence, survival of the fittest, and other concepts that form the foundation of evolutionary theory. Unabridged republication of the edition published by John Murray, London, 1859.
Here's a sample of other books in this Dover category
The Triumph of the Darwinian Method by Michael T. Ghiselin A coherent treatment of the flow of ideas throughout Darwin's works, this volume presents a unified theoretical system that explains Darwin's investigations, evaluating the literature from a historical, scientific, and philosophical perspective.