Twin brother and sister, James and Morgan, visit Grand Canyon National Park with their parents and go on an adventurous, often demanding, three-day hike learning much about the geology,
animals, plants, and history of one of the earth's largest canyons. Accompanying sidebar notes include additional facts about the canyon and the facilities, major sites, and rules of the
national park.Twin brother and sister, James and Morgan, visit Grand Canyon National Park with their parents and go on an adventurous, often demanding, three-day hike learning much about the
geology, animals, plants, and history of one of the earth's largest canyons.
