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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. Filled with up-to-date information, photographs, illustrations, and fun tidbits from Jack and Annie, the Magic Tree House Fact Trackers are the perfect way for kids to find out more about the topics they discover in their favorite Magic Tree House adventures. And teachers can use the Fact Trackers alongside their Magic Tree House fiction companions to meet Common Core text pairing needs. Did you know that there’s a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com!","forthcoming":false,"isbn13":"9780385386449","publication_date":"20160105","publisher":"Random House Children's Books","slug":"dogsledding-and-extreme-sports","subtitle":"A Nonfiction Companion to Magic Tree House Merlin Mission #26: Balto of the Bluedawn","title":"Dogsledding and Extreme Sports"},"discovery":{"categories":{"all":[{"bisac_code":"JNF003060","confidence_band":"medium","label":"Dogs","score":0.7905,"source":"bisac_hint_model"},{"bisac_code":"JNF054180","confidence_band":"medium","label":"Extreme Sports","score":0.77,"source":"bisac_hint_model"},{"bisac_code":"JNF054160","confidence_band":"medium","label":"Winter Sports","score":0.761,"source":"bisac_hint_model"}],"hint":[{"bisac_code":"JNF003060","confidence_band":"medium","label":"Dogs","score":0.7905,"source":"bisac_hint_model"},{"bisac_code":"JNF054180","confidence_band":"medium","label":"Extreme Sports","score":0.77,"source":"bisac_hint_model"},{"bisac_code":"JNF054160","confidence_band":"medium","label":"Winter Sports","score":0.761,"source":"bisac_hint_model"}],"publisher":[{"bisac_code":"JNF003060","confidence_band":"high","label":"Dogs","score":1,"source":"onix_publisher_code"},{"bisac_code":"JNF047000","confidence_band":"high","label":"Chapter Books","score":1,"source":"onix_publisher_code"},{"bisac_code":"JNF054180","confidence_band":"high","label":"Extreme Sports","score":1,"source":"onix_publisher_code"}]},"genres":[{"label":"Dogs","score":0.7905,"slug":"dogs"},{"label":"Extreme Sports","score":0.77,"slug":"extreme-sports"},{"label":"Winter Sports","score":0.761,"slug":"winter-sports"}],"reader_fit":["Kids curious about dogsled racing and extreme sports","Readers who enjoy nonfiction facts with photos and illustrations"],"related_lists":[],"series":null,"similar_books":[{"authors":["Mary Pope Osborne","Natalie Pope Boyce"],"book_id":"9780375832222","cover_image_url":"https://img.bookfrontier.com/9780375832222.jpg?v=debd54569bf5c8e8","score":0.827,"title":"Polar Bears and the Arctic","url":"https://bookfrontier.com/books/9780375832222"},{"authors":["Mary Pope Osborne","Natalie Pope Boyce"],"book_id":"9780375870262","cover_image_url":"https://img.bookfrontier.com/9780375870262.jpg?v=da08f187e07be7d2","score":0.8054,"title":"Horse Heroes","url":"https://bookfrontier.com/books/9780375870262"},{"authors":["Mary Pope Osborne"],"book_id":"9780679890669","cover_image_url":"https://img.bookfrontier.com/9780679890669.jpg?v=7d9446f2d0acf5c7","score":0.7936,"title":"Dingoes at Dinnertime","url":"https://bookfrontier.com/books/9780679890669"},{"authors":["Mary Pope Osborne","Natalie Pope Boyce"],"book_id":"9780375846649","cover_image_url":"https://img.bookfrontier.com/9780375846649.jpg?v=05dbac83bf81b2ff","score":0.7901,"title":"Penguins and Antarctica","url":"https://bookfrontier.com/books/9780375846649"},{"authors":["Mary Pope Osborne"],"book_id":"9780679883418","cover_image_url":"https://img.bookfrontier.com/9780679883418.jpg?v=ec296d3bc51b6b3e","score":0.7877,"title":"Polar Bears Past Bedtime","url":"https://bookfrontier.com/books/9780679883418"}],"topics":[{"evidence_refs":["keyword:non fiction books for kids age 9 12"],"label":"Kids","score":1,"slug":"kids"},{"evidence_refs":["keyword:kids books ages 9-12"],"label":"Ages","score":0.2642,"slug":"ages"},{"evidence_refs":["keyword:3rd grade books"],"label":"Grade","score":0.1531,"slug":"grade"},{"evidence_refs":["keyword:extreme sports"],"label":"Sports","score":0.0679,"slug":"sports"}],"what_you_get":["Themes: Dogsled racing and the Iditarod, Extreme sports, Testing physical limits.","Themes: Kids, Ages, Grade.","Reading lane: Dogs and Extreme Sports."]},"llm_signals":{"confidence":0.94,"pacing":"unknown","reader_fit":["Kids curious about dogsled racing and extreme sports","Readers who enjoy nonfiction facts with photos and illustrations"],"themes":["Dogsled racing and the Iditarod","Extreme sports","Testing physical limits"],"tropes":[]},"source_presence":{"amazon":true,"book_detail":true,"goodreads":true,"llm_signals":true,"similarity_seed":true},"stats":{"amazon_ratings_count":130,"goodreads_ratings_count":168,"goodreads_reviews_count":17,"quality_score":0.888}}