Mary Pope Osborne Balto of the Blue Dawn(Magic Tree House #54)-蓝色黎明的巴尔托

作者  : Mary Pope Osborne

书名  : Balto of the Blue Dawn(Magic Tree House #54)《蓝色黎明的巴尔托》

简介 ：The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system!

When Jack and Annie came back from their adventure in Magic Tree House Merlin Mission #26: Balto of the Blue Dawn, they had lots of questions. How do sled dogs race for so long? When was the first Iditarod? What are some other extreme sports? Find out the answers to these questions and more as Jack and Annie track the facts about the Iditarod, open water swimming, the Ironman triathlon, free climbing, the X Games, and other ways people test their limits. 

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