Undaunted Courage (ISBN 0684811073), written by Stephen Ambrose, is a 1996 biography of Meriwether Lewis, William Clark, and the Lewis and Clark Expedition. The book is based on journals written by Lewis and Clark, along with other members of the expedition, and also offers additional insight into the travelers and their thoughts. The book outlines the expedition in great detail, from encounters with Native Americans, trading, wildlife, what the explorers ate, and the route the expedition took on its way to the Pacific Coast and back. The text is supplemented by maps, and illustrations drawn by Lewis himself. Brief biographies of the major members of the expedition (Lewis, Clark, Sacagawea, etc.) are also offered.