William C. Tweed has studied, researched, and explored Sequoia and Kings Canyon National Parks for nearly forty years as a writer, park ranger, and Chief Park Naturalist. Since 1997, he has written more than 400 essays about nature in central California in a column for the Visalia Times-Delta newspaper. He is also the author of Uncertain Path: A Search for the Future of National Parks (University of California Press, 2010), Death Valley and the Northern Mojave: A Visitor's Guide, with Lauren Davis (Cachuma Press, 2003), Exploring Mountain Highways: A Road Guide to Sequoia and Kings Canyons National Parks (Sequoia Natural History Association, 1984), and Sequoia and Kings Canyon: The Story behind the Scenery (KC Publications, 1980; VistaBooks, 1997).
Lary M. Dilsaver, a native Californian, is Professor Emeritus of Historical Geography at the University of South Alabama and a thirty-year volunteer researcher for the National Park Service. He has written more than forty articles and book chapters on national parks and historic landscapes, and he has authored or edited six books, including Preserving the Desert: The History of Joshua Tree National Park (George F. Thompson Publishing, 2016), America's National Park System: The Critical Documents (Rowman and Littlefield, 1994; 2016), and Cumberland Island National Seashore: A History of Conservation Conflict (University of Virginia Press, 2004).