Books about Animals -- Juvenile fiction (sorted alphabetically)
- White Tail the Deer's Adventures George Ethelbert Walsh
- Wild Adventures in Wild Places Gordon Stables
- Wild Man of the West: A Tale of the Rocky Mountains R. M. Ballantyne
- Willie Mouse Alta Tabor
- Winkie, the Wily Woodchuck: Her Many Adventures Richard Barnum
- Winnie-the-Pooh A. A. Milne
- Winter Adventures of Three Boys in the Great Lone Land Egerton Ryerson Young
- Wishing-Stone Stories Thornton W. Burgess
- Wongo and the Wise Old Crow Grace Moon and Carl Moon
- Woodside Caroline Hadley
- World of Ice R. M. Ballantyne
- Youngest Camel Kay Boyle
- Young Hero; Or, Fighting to Win Edward Sylvester Ellis
- Young Wild-Fowlers Harry Castlemon
- Zankiwank and The Bletherwitch: An Original Fantastic Fairy Extravaganza S. J. Adair Fitz-Gerald
- Zweifüßler und andere Geschichten: Naturgeschichtliche Märchen (German) Carl Ewald