The United States has been shaped by the people and events of if its past. This series vividly describes events that determined the course of U.S. history and introduces young readers to the people who influenced these events. The easy-to-read text, historic photographs, suggested activities, and clear, simple maps help bring to life the causes of these events, their effects on people at the time, and their significance today. This book tells the story of why the Anasazi climbed the mesa and how they lived there. It examines the Anasazi people's move to the extraordinary cliff dwellings and their sudden disappearance from the region.