MARY POPE OSBORNE and NATALIE POPE BOYCE are sisters who grew up on army posts all over the world. Mary is the author of more than 50 acclaimed books for children. Natalie has worked as a children's librarian and as a teacher of English and E.S.L.
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The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! 'Where are the lions?' Jack wonders when the Magic Tree House whisks him and his sister to the vast plains of Africa.... SEE MORE