2 BOOKS IN 1! Get whisked away in the #1 bestselling chapter book series of all time! This bindup includes the first two adventures with Jack and Annie as they travel in time and all over the world. . . There´s a mysterious tree house in the woods. Jack and Annie don´t know where it came from, but it´s filled with books. . . and magic! Before they know it, the tree house whisks Jack and Annie to the prehistoric past. Then to the time of knights and castles! Can they make it home before their parents notice?  Introduce your young reader to the adventures that have been beloved by kids, teachers, librarians, and parents for generations! This bindup includes DINOSAURS BEFORE DARK and THE KNIGHT AT DAWN.