Super Volcano: The Ticking Time Bomb Beneath Yellowstone National Park
Roadside Geology of Yellowstone Country
Eruption: The Untold Story of Mount St. Helens
Carving Grand Canyon: Evidence, Theories, and Mystery (Second Edition)
The 1959 Yellowstone Earthquake (Disaster)
Yellowstone Treasures: The Traveler's Companion to the National Park
Yellowstone for Nature Photographers
Full-Rip 9.0: The Next Big Earthquake in the Pacific Northwest