As one of the most fascinating & volatile forces on earth, volcanoes have long been the subject of worship, fear, & study. With the aid of famous `case histories` Lopes provides a unique background to volcanoes, what they are, why they form, & how they erupt. From the Sunset Crater in Arizona & Krakatau in Indonesia to the exotic volcanoes of the outer solar system this guide illustrates the dangers of volcanoes & their importance in shaping the world around us.