Bonnie Johanna Gisel is an environmental historian who taught at Drew University, Green Mountain College, and the University of the Pacific. She is the author of "Nature's Beloved Son: Rediscovering John Muir's Botanical Legacy (2008) and Kindred & Related Spirits: The Letters of John Muir and Jeanne C. Carr (2001). In addition, Gisel has published articles, curated exhibits, lectured, and co-chaired conferences on John Muir.