- Walks of a Lifetime in America's National Parks: Extraordinary Hikes in Exceptional Places
- Walks of a Lifetime: Extraordinary Hikes from Around the World
- Walks of a Lifetime from Around the World: Extraordinary Hikes in Exceptional Places
- A Guide to America's World Heritage Sites: The Heritage of Humanity
- Book of Fruits: Being a Descriptive Catalogue of the Most Valuable Varieties