{"schema_version":"bf_book_companion_v1","release_id":"20260414T102527Z","book":{"amazon_purchase_url":"https://www.amazon.com/dp/0375813659?tag=bookfrontier-20","asin":"0375813659","authors":["Mary Pope Osborne","Sal Murdocca"],"book_id":"9780375813658","canonical_url":"https://bookfrontier.com/books/9780375813658","cover_image_url":"https://img.bookfrontier.com/9780375813658.jpg?v=20260414T102527Z%3A2026-04-14T10%3A25%3A27Z","description":"Magic. Mystery. Time-travel. Get whisked back in time in the magic tree house with Jack and Annie in this boxed set featuring books 1-4 of the #1 bestselling chapter book series! Meet Jack and Annie! Jack and his younger sister, Annie, are just regular kids. But when they discover a tree house in the woods, something magical happens. Jack and Annie are whisked back in time to the Age of Dinosaurs, a medieval castle, ancient pyramids, and treasure-seeking pirates. 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