Did you know that dogs have pulled sleds for more than 1, 000 years? Some North American Aboriginal people used dog sleds as their main mode of transportation. Learn more about the work these dogs do in Sled Dogs, a title in the Dogs with Jobs series. Each Dogs with Jobs title features easy-to-read text, stunning visuals, and a challenging educational activity. Dogs with Jobs is a series of AV2 media enhanced books. A unique book code printed on page 2 unlocks multimedia content. These books come alive with video, audio, weblinks, slideshows, activities, hands-on experiments, and much more.