Boston: Houghton Mifflin, 1999. dj. Hardcover first edition - The story of the Cope-March feud that erupted when dinosaur fossils were first discovered in the West.. Notes, bibliography, index. Illustrated with photographs. 365 pp. ISBN: 0-395850894.

Albuquerque: University of New Mexico Press, (1994) dj. SIGNED hardcover first edition - Four essays discussing the role of the natural environment in the making the US West, including one on John Wesley Powell and another on the warming of the West, and especially the Great Plains area. A Volume in the Calvin P. Horn Lectures in Western History and Culture. SIGNED on the title page and uncommon thus. Worster received the Bancroft Prize in American history in 1980. Notes, index. xii, 151 pp. ISBN: 0-826314813.