Michael J YochimMichael J. Yochim (1966-2020) worked for twenty-two years at Yellowstone National Park as well as at Yosemite, Grand Canyon, and Sequoia. His books include Yellowstone and the Snowmobile: Locking Horns over National Park Use A Week in Yellowstone's Thorofare: A Journey Through the Remotest Place, Essential Yellowstone: A Landscape of Memory and Wonder, and Protecting Yellowstone: Science and the Politics of National Park Management (UNM Press). Read More Read Less