The first paperback edition of the acclaimed best-selling companion volume to the PBS television series. This is the story of the journey that transformed our nation forever. Led by two remarkable and utterly different commanders - the brilliant but troubled Meriwether Lewis and his trustworthy, gregarious friend William Clark - the 1804 expedition had been commissioned by President Thomas Jefferson and was manned by a diverse crew from every corner of the young nation, including a slave named York and the Shoshone woman Sacagawea. Together they crossed the continent; faced incredible hardship, disappointment, and danger; and shared in one of America's most enduring adventures. Their story has passed into national mythology. This richly illustrated volume includes extensive excerpts from the journals kept by the captains and the enlisted men, as well as a wealth of paintings, photographs, diary sketches, maps, and film images from the PBS documentary.