- Natural Rivals: John Muir, Gifford Pinchot, and the Creation of America's Public Lands
- Stories from Montana's Enduring Frontier: Exploring an Untamed Legacy
- Red Lodge
- Flora Virginica: Exhibens Plantas Quas V. C. Johannes Clayton In Virginia Observavit Atque Collegit, Volumes 1-2
- The Cowboy Girl: The Life of Caroline Lockhart (Women in the West)