In Dinosaurs Before Dark, Jack and his younger sister, Annie, stumble upon a tree house filled with books. Where did the tree house come from? How long has it been there? When Jack reads a book about the Cretaceous period, 65 million years ago, and wishes he could really see the Pteranodon, it suddenly appears at his window. In The Knight at Dawn Jack and Annie find peacocks for dinner and boys in skirts when the Magic Tree House transports them back to the Middle Ages.
"magic tree house"