The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system!

Catch the wave! That's what Jack and Annie do when the Magic Tree House whisks them back to a Hawaiian island of long ago. They learn how to surf and have a great time—until strange things start happening. Jack and Annie soon discover the cause: A tidal wave is headed their way! Can they help save their new friends in time?