Sacagawea's life is shrouded in mystery. Although she died around the age of 24, her role as a guide and interpreter during the Lewis and Clark Expedition have landed her a permanent place in history. Readers explore the history of Sacagawea and the Lemhi Shoshone people, learning how she and her tribe were forever changed by the arrival of Europeans in their land. However, readers also learn how her contributions affected the course of United States history. With its focus on social studies, this historical biography brings important classroom concepts to life. Primary sources, historical artwork, sidebars, and a timeline complement the text's information-rich content.