Books in Biology (sorted by popularity)
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- On the Origin of Species By Means of Natural Selection Charles Darwin 3474 downloads
- The Variation of Animals and Plants under Domestication Charles Darwin 3041 downloads
- The Origin of Species by Means of Natural Selection Charles Darwin 1318 downloads
- On the Origin of Species by Means of Natural Selection Charles Darwin 885 downloads
- Zoonomia; Or, the Laws of Organic Life, Vol. I Erasmus Darwin 525 downloads
- Contributions to the Theory of Natural Selection Alfred Russel Wallace 488 downloads
- Explanation of Terms Used in Entomology John Bernhard Smith 404 downloads
- The Foundations of the Origin of Species Charles Darwin 366 downloads
- Social Life in the Insect World Jean-Henri Fabre 329 downloads
- An Elementary Study of Insects Leonard Haseman 325 downloads
- Our Vanishing Wild Life: Its Extermination and Preservation William T. Hornaday 312 downloads
- On the Origin of Species by Means of Natural Selection Charles Darwin 311 downloads
- Our Common Insects A. S. Packard 261 downloads
- The History of Insects Unknown 251 downloads
- Birds of the Indian Hills Douglas Dewar 246 downloads
- On the Origin of Species Charles Darwin 245 downloads
- The Dawn of Reason; or, Mental Traits in the Lower Animals Jr. James Weir 211 downloads
- Fathers of Biology Charles McRae 205 downloads
- Wild Nature Won By Kindness Mrs. Brightwen 200 downloads
- What is Darwinism? Charles Hodge 190 downloads
- Birds in Town & Village W. H. Hudson 188 downloads
- On the Genesis of Species St. George Jackson Mivart 167 downloads
- Evolution in Modern Thought 159 downloads
- The Wonders of Instinct: Chapters in the Psychology of Insects Jean-Henri Fabre 158 downloads
- The Life-Story of Insects George H. Carpenter 147 downloads
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