Judith St. George has published dozens of successful nonfiction books for children, including the Caldecott Medal-winning So You Want to Be President? and the historical Turning Point series, including You're On Your Way, Teddy Roosevelt; Stand Tall, Abe Lincoln; and Take the Lead, George Washington. You can visit her online at www.judithstgeorge.com.

When Meriwether Lewis, William Clark, and the "Corp of Discovery" left St. Louis, Missouri, on May 21, 1804, their mission was to explore the vast, unknown territory acquired a year earlier in the Louisiana Purchase. The travelers hoped to find a waterway that crossed the western half of the United States. They didn't. However, young readers will love this true-life adventure tale of the two-year journey that finally brought the explorers to the Pacific Ocean.