- I Go A-Fishing
- I monti del Chianti
- Icebergs and Albatrosses (But Mostly Penguins)
- Illuminated By Water
- In a Fishing Country
- In Africa - Hunting Adventures in Big Game Country (1910)
- In and Around Banff - A Guide to the History and Scenery of the Canadian Rockies
- In and Out of the Pig-Skin
- In Praise of Walking
- Indian Clubs and Dumb Bells - Spalding's Athletic Library
- Indian Clubs and How to Use Them - A New and Complete Method for Learning to Wield Light and Heavy C...
- Indian Clubs, Dumb-Bells, and Sword Exercises
- Insatiable
- Inside the Wild
- Inspire
- Into the Forest
- Introduction to Rock and Mountain Climbing