Books about Natural history -- Juvenile fiction (sorted by popularity)
- The Hunter Cats of Connorloa Helen Hunt Jackson 36 downloads
- Captain Mugford: Our Salt and Fresh Water Tutors William Henry Giles Kingston 35 downloads
- Two Ways of Becoming a Hunter Harry Castlemon 35 downloads
- Minnie's Pet Parrot Madeline Leslie 35 downloads
- Minnie's Pet Lamb Madeline Leslie 34 downloads
- The Story Without an End Friedrich Wilhelm Carové 34 downloads
- The Young Wild-Fowlers Harry Castlemon 34 downloads
- Fighting the Whales R. M. Ballantyne 34 downloads
- On the Banks of the Amazon William Henry Giles Kingston 34 downloads
- Captured by Apes; or, How Philip Garland Became King of Apeland Harry Prentice 33 downloads
- Jack at Sea: All Work and No Play Made Him a Dull Boy George Manville Fenn 33 downloads
- The Sun's Babies Edith Howes 33 downloads
- Ihmissyöjäin vankina: Seikkailuja Afrikan aarniometsissä (Finnish) Verney Lovett Cameron 32 downloads
- Ungava R. M. Ballantyne 32 downloads
- The Lost Mountain: A Tale of Sonora Mayne Reid 31 downloads
- Minnie's Pet Horse Madeline Leslie 30 downloads
- Joe Wayring at Home; or, The Adventures of a Fly-Rod Harry Castlemon 30 downloads
- The Life of a Celebrated Buccaneer Richard Clynton 30 downloads
- The Crystal Hunters: A Boy's Adventures in the Higher Alps George Manville Fenn 30 downloads
- The Ocean Cat's Paw: The Story of a Strange Cruise George Manville Fenn 29 downloads
- Minnie's Pet Cat Madeline Leslie 28 downloads
- Red Rooney: The Last of the Crew R. M. Ballantyne 28 downloads
- Lion Ben of Elm Island Elijah Kellogg 28 downloads
- Gulf and Glacier; or, The Percivals in Alaska Willis Boyd Allen 27 downloads
- Jungle and Stream; Or, The Adventures of Two Boys in Siam George Manville Fenn 27 downloads