The Magic Tree House #54: Balto Of

"The magic tree house has returned and it's taking Jack and Annie back in time to Alaska, 1925. There they meet Balto, a jet-black Siberian husky destined to save victims of the diphtheria epidemic. But the trail isn't easy, and Balto is going to need Jack and Annie's help! Have more fun with Jack and Annie on the Magic Tree House website at MagicTreeHouse.com."