Book excerpt: Did you know that animals can often sense when a volcano is going to erupt? Or that the force of an eruption is measured on the VEI, or Volcanic Explosivity Index? What is the difference between a shield volcano and a stratovolcano? And what were the largest eruptions in human history? All of these facts and more can be found in this fantastic guide to volcanoes, separated into sections for easy reading. This book is perfect for those studying volcanoes at school, or even if you are just interested in finding out more about this fascinating topic.