Merriwether Lewis: Journey Across America tells about how Merriwether Lewis led a group of explorers on a daring journey across the whole American continent. Chosen by President Thomas Jefferson to lead the expedition, Mr. Lewis agreed as long as he could ask his good friend William Clark to be his co-leader on the expedition. With the help of many Native American tribes, the explorers overcame great obstacles to reach the vast Pacific Ocean. From the river highways of the Missouri and Mississippi to the grassy Great Plains full of buffalo, to the steep Rocky Mountains and the dangerous rapids of the Columbia, the journey of Merriwether Lewis and William Clark was one of America's greatest adventures This book is part of the Heroes of History for Young Readers series which captivates younger children with rhyming poems and unforgettable color illustrations.