Discover More Readers: Volcanoes is a Level 3 Reader (ages 7-9) for independent learners with timelines, vivid charts, exciting photographs and technical vocabulary. Independent readers can take their first steps to becoming a junior volcanologist. Learn about the scientific and human history behind the natural phenomenon of the vents in our Earth's crust. Comes with a free digital book featuring extra content, games and activities, plus audio and video enhancements.