Ambrose, Stephen E. Lewis & Clark: Voyage of Discovery. Washington, D.C.: National Geographic Society, 1998. Ambrose combines stunning photographs with historical narrative, interviews, and choice entries from the explorerís journals. The author also suggests how to discover the trail today.

Ambrose, Stephen E. Undaunted Courage. New York: Touchstone, Simon & Schuster, 1996. This national bestseller provides a vivid account of Lewis and Clarkís journey, as well as political, cultural, and biographical information related to the expedition.

Cavan, Seamus. Lewis and Clark and the Route to the Pacific. World Explorers Series. New York: Chelsea House Publishers, 1991. An informative textbook on Lewis and Clark for students, this book is also an excellent resource for teachers.

Cutright, Paul Russell. Lewis and Clark: Pioneering Naturalists. Urbana: University of Illinois Press, 1969. The natural history of the expedition is presented in an entertaining way. The book contains useful catalogues of plants and animals.

Duncan, Dayton. Lewis and Clark: An Illustrated History. New York : Knopf, 1997. Based on the documentary film by Ken Burns shown on PBS, Duncanís book also offers contributions by Stephen Ambrose, Erica Funkhouser, and William Least Heat Moon.

Hall, Eleanor J. The Lewis and Clark Expedition.. San Diego: Lucent Books, 1996. This detailed book is an excellent resource for teachers and students, presenting journal excerpts, maps, a timeline, and a reading list.

Hunken, Jorie, and the New England Wild Flower Society. Botany for All Ages. Chester, Conn.: Globe Pequot Press, 1989. Lessons, activities, and teaching techniques are outlined to help children discover nature.

Ode, David J. Dakota Flora: A Seasonal Sampler. Pierre: South Dakota Historical Society Press, 2006. Science and lore on eighty-two of South Dakotaís wild plants are presented by season in order of the plantsí flowering and fruiting.

Ronda, James P. Finding the West: Explorations with Lewis and Clark. Albuquerque: University of New Mexico Press, 2001. An important Lewis and Clark scholar reflects on the Lewis and Clark Expedition and its meaning for modern America.

Ronda, James P., and Nancy Tystad Koupal, eds. Finding Lewis and Clark: Old Trails, New Directions. Pierre: South Dakota Historical Society Press, 2004. This book provides new insights into the Lewis and Clark legacy and includes chapters on teaching and web resources.

Thom, James Alexander. Sign-Talker: The Adventure of George Drouillard on the Lewis and Clark Expedition. New York: Ballantine Books, 2000. This historical novel provides a refreshing account from another point of view. George Drouillard, the French-Shawnee man that Lewis and Clark hired to act as both interpreter and guide, is the narrator.