Books 13–16 of the New York Times bestselling Magic Tree House series boxed together for the first time! These four titles are the perfect gift for a Magic Tree House fan or any child who loves a good adventure. Parents, teachers, and librarians hail the chapter-book series as a tool to promote reading, as even the most reluctant readers want to know where the Magic Tree House will take the brother-and-sister team next. In books 13–16, Jack and Annie must save stories that have been lost in history. Morgan, the magical librarian of Camelot, sends them to find the books in the ancient worlds of Roman Pompeii, imperial China, Dark Age Ireland, and classical Greece. Will Jack and Annie be able to save the stories in their darkest hours . . . or will the books be lost forever? Books in this set include: Vacation Under the Volcano (#13), Day of the Dragon King (#14), Viking Ships at Sunrise (#15), and Hour of the Olympics (#16). Don’t miss all the fun things you can do and discover at MagicTreeHouse.com!