Books in Biology (sorted by popularity)
- American Addresses, with a Lecture on the Study of Biology Thomas Henry Huxley 159 downloads
- On the Genesis of Species St. George Jackson Mivart 159 downloads
- The History of Insects Unknown 158 downloads
- Lamarck, the Founder of Evolution: His Life and Work A. S. Packard 156 downloads
- The Origin of Species Thomas Henry Huxley 152 downloads
- Development of the Digestive Canal of the American Alligator A. M. Reese 148 downloads
- Evolution in Modern Thought 142 downloads
- The Foundations of the Origin of Species Charles Darwin 139 downloads
- Darwin and Modern Science A. C. Seward 138 downloads
- Contributions to the Theory of Natural Selection Alfred Russel Wallace 136 downloads
- Darwin, and After Darwin, Volumes 1 and 3 George John Romanes 135 downloads
- Species and Varieties, Their Origin by Mutation Hugo de Vries 135 downloads
- Love's Meinie: Three Lectures on Greek and English Birds John Ruskin 134 downloads
- Evolution: An Investigation and a Critique Theodore Graebner 132 downloads
- Text Book of Biology, Part 1: Vertebrata H. G. Wells 132 downloads
- Our Common Insects A. S. Packard 129 downloads
- Nouveaux souvenirs entomologiques - Livre II (French) Jean-Henri Fabre 119 downloads
- The Dawn of Reason; or, Mental Traits in the Lower Animals Jr. James Weir 118 downloads
- Fathers of Biology Charles McRae 117 downloads
- Life History of the Kangaroo Rat Charles Taylor Vorhies and Walter P. Taylor 116 downloads
- Darwiniana : Essays — Volume 02 Thomas Henry Huxley 113 downloads
- The Minds and Manners of Wild Animals: A Book of Personal Observations William T. Hornaday 112 downloads
- De l'origine des espèces (French) Charles Darwin 112 downloads
- On the Reception of the 'Origin of Species' Thomas Henry Huxley 109 downloads
- Synopsis of Some Genera of the Large Pyrenomycetes C. G. Lloyd 107 downloads