Synopsis: The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Jack and Annie travel back in time to a desert in the Middle East. There they meet a Bedouin tribe and learn about the way that they live. From camel rides and oases to ancient writings and dangerous sandstorms, here’s another Magic Tree House filled with all the mystery, history, magic, and old-fashioned adventure that…