Few natural events are as formidable and fascinating as an erupting volcano. Volcanoes are reminders of the constant processes taking place below the surface of Earth. While readers may have heard of the eruptions of Mount Vesuvius and Mount St. Helens, they may not know that Yellowstone National Park is due to erupt, too! The mechanics of plate tectonics, the kinds of volcanoes, historical eruptions, and geothermal energy are the diverse topics of these 100 facts. Awe-inspiring photographs and fun quizzes add to the valuable information.