In the early 1800s, the western half of North America was a vast, unmapped wilderness filled with towering mountains, rushing rivers, and endless plains. President Thomas Jefferson needed brave explorers to journey into this unknown territory, and he chose Meriwether Lewis and William Clark to lead the way. Join the famous duo and their Corps of Discovery as they set off from St. Louis on an epic expedition all the way to the Pacific Ocean. Along the way, you will meet Sacagawea, the brilliant Shoshone guide who helped them navigate the treacherous landscape, and discover the incredible wildlife and natural wonders they encountered. This engaging, vividly illustrated biography brings a monumental chapter of American history to life. It is the perfect introduction to the courage, teamwork, and curiosity that drove one of the greatest exploratory missions of all time.