Don Laine
Frommer's Zion and Bryce Canyon National Parks
The Creaky Knees Guide Arizona: The 80 Best Easy Hikes
Frommer's National Parks of the American West
Frommer's Denver, Boulder and Colorado Springs (Frommer's Complete Guides)
Frommer's Rocky Mountain National Park (Park Guides)
Frommer's Denver, Boulder & Colorado Springs, 5th Edition