This fascinating book describes the geological makeup and history of the Sahara Desert in North Africa. The biggest hot desert on Earth, it covers parts of twelve countries—more area than the entire United States! The Sahara has oases scattered widely and sand dunes that can reach as high as 600 feet (182m). Readers will learn about the people, plants, and animals such as camels, goats, and fennec foxes that inhabit this desert habitat. Special sections describe the desert's natural resources, such as oil and natural gas, and the unique problems facing this region.