Cambridge Discovery Education Interactive Readers are the next generation of graded readers - captivating topics, high-impact video, and interactive exercises designed to motivate and engage. Would you live in space? How about in a cave? Would you mind living below a volcano? Explore the many dangerous and unusual places people can live all over (and outside of!) the world. Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 2893. Lexile Reading Level: 960L