Magic Tree House Boxed Set, Books 1-4: Dinosaurs Before Dark, The Knight at Dawn, Mummies in the Morning, and Pirates Past Noon

**Description from Amazon: The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! 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 an...