Books about Natural history -- Juvenile fiction (sorted by popularity)
- In Search of a Son William S. Walsh 120 downloads
- Minnie's Pet Monkey Madeline Leslie 118 downloads
- The American family Robinson : or, The adventures of a family lost in the great desert of the West. D. W. Belisle 117 downloads
- The Golden Dream: Adventures in the Far West R. M. Ballantyne 117 downloads
- Cast Away in the Cold I. I. Hayes 117 downloads
- The Swan and Her Crew G. Christopher Davies 115 downloads
- The Coral Island: A Tale of the Pacific Ocean R. M. Ballantyne 113 downloads
- Gulf and Glacier; or, The Percivals in Alaska Willis Boyd Allen 113 downloads
- Down South; or, Yacht Adventure in Florida Oliver Optic 113 downloads
- Harry Milvaine; Or, The Wanderings of a Wayward Boy Gordon Stables 111 downloads
- Silver Rags Willis Boyd Allen 110 downloads
- The Lost Mountain: A Tale of Sonora Mayne Reid 110 downloads
- Among the Esquimaux; or, Adventures under the Arctic Circle Edward Sylvester Ellis 109 downloads
- The Wild Man of the West: A Tale of the Rocky Mountains R. M. Ballantyne 109 downloads
- In Savage Africa Verney Lovett Cameron 108 downloads
- The Kangaroo Hunters; Or, Adventures in the Bush active 19th century Anne Bowman 107 downloads
- Professor Johnny J. Ā. K. 107 downloads
- Afar in the Forest William Henry Giles Kingston 105 downloads
- The Island Queen R. M. Ballantyne 105 downloads
- On the Banks of the Amazon William Henry Giles Kingston 104 downloads
- The Crystal Hunters: A Boy's Adventures in the Higher Alps George Manville Fenn 103 downloads
- Nat the Naturalist: A Boy's Adventures in the Eastern Seas George Manville Fenn 103 downloads
- P. T. Barnum's Menagerie P. T. Barnum and Sarah J. Burke 103 downloads
- Adventures in the Far West William Henry Giles Kingston 103 downloads
- The Big Otter R. M. Ballantyne 102 downloads