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. Alaska is one of the most beautiful places on Earth. It's also one of the most dangerous. Mountains, bears, glaciers, and dog sledding: explore the natural beauty and unique way of life in this US state. Use your unique code to access the online reader, complete with videos and interactive exercises. Plus, download a free e-book version of the reader!