Books in Biology (sorted by popularity)
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- On the Origin of Species By Means of Natural Selection Charles Darwin 2720 downloads
- The Origin of Species by Means of Natural Selection Charles Darwin 1145 downloads
- On the Origin of Species by Means of Natural Selection Charles Darwin 811 downloads
- On the Origin of Species by Means of Natural Selection Charles Darwin 428 downloads
- Explanation of Terms Used in Entomology John Bernhard Smith 384 downloads
- Social Life in the Insect World Jean-Henri Fabre 289 downloads
- Zoonomia; Or, the Laws of Organic Life, Vol. I Erasmus Darwin 278 downloads
- An Elementary Study of Insects Leonard Haseman 274 downloads
- Our Vanishing Wild Life: Its Extermination and Preservation William T. Hornaday 253 downloads
- The History of Insects Unknown 223 downloads
- Wild Nature Won By Kindness Mrs. Brightwen 214 downloads
- My Studio Neighbors W. Hamilton Gibson 184 downloads
- Birds of the Indian Hills Douglas Dewar 182 downloads
- What is Darwinism? Charles Hodge 160 downloads
- Life History of the Kangaroo Rat Charles Taylor Vorhies and Walter P. Taylor 158 downloads
- The Wonders of Instinct: Chapters in the Psychology of Insects Jean-Henri Fabre 149 downloads
- Our Common Insects A. S. Packard 149 downloads
- Birds in Town & Village W. H. Hudson 143 downloads
- The Human Side of Animals Royal Dixon 143 downloads
- Anecdotes of the Habits and Instinct of Animals Mrs. R. Lee 137 downloads
- On the Genesis of Species St. George Jackson Mivart 129 downloads
- Form and Function: A Contribution to the History of Animal Morphology E. S. Russell 128 downloads
- The Life-Story of Insects George H. Carpenter 115 downloads
- Evolution in Modern Thought 111 downloads
- The Variation of Animals and Plants under Domestication Charles Darwin 111 downloads
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