Sacagawea was an indispensable aid to the Lewis and Clark Expedition as they traveled across the continent exploring young America's new land. She was instrumental in the success of the journey. This biography from the "American Heroes" series focuses on the life of Sacagawea, her family and heritage, as well as her influence on a fledgling nation. Supplemental sections include a time line of important dates, a glossary of words to know, a pronunciation guide, a list of sources that readers can reference to learn more about Sacagawea, and an index. Colorful paintings, photographs, and illustrations bring the Lewis and Clark Expedition to life as Collard describes the Corps of Discovery's travels and Sacagawea's constant role in assisting as translator, procurer of horses, and as an experienced cool-headed guide. While most of history allocates little more than a footnote to Sacagawea, Collard delves into what little is known about her life as a prisoner, mother, and guide in one of the most pivotal journeys in American history. Collard delivers a beautifully simple, fact-filled book honoring an unassuming yet transformational American hero.