Jack and Annie couldn't sleep because of the mystery tree house that they found yesterday in woods, Frog Creek, Pennsylvania. As they pointed a dinosaur picture book in there and made a wish, the tree house took them into dinosaurs time. And they came back home form dinosaurs land, as they pointed to a picture of Frog Creek woods and made a wish. That was magic!

They went to the woods again at dawn today, and it was sill there. Along the magic way, they pointed a picture of book about knights and castles, and they wished to see that guy for real. They didn't forget the book about Pennsylvania, and brought it with them.

The knight crossed a moat over a drawbridge. There was a big party in a castle feast. Jack and Annie also crossed the drawbridge but a guard on top of the castle wall shouted at them. They hid in a dark corner and slipped into the feast in the Creat Hall. But a man found them, so they dashed to a armory room. They were arrested by three huge men. The men tugged them into a dungeon. Yelling at them, Annie waved their flashlight onto the face of men, as they ran away.

When they heard shouting behind them, they shoved into a storeroom. They studied a map of the castle in the book there. They found a secret passage to a precipice over the moat. Finally they reached at the end of the passage.

They fell down in the moat, then swam and crawled over an embankment in foggy darkness. They were trapped in cold darkness.

Just then, they saw the knight riding on a black horse. He took them toward the tree house riding on the horse. He was gone after all.

They pointed at the hometown picture as they wished, and got back home.

When Jack was back on his bed, he noticed a letter on the bookmark that was the same fancy M on the medallion picked up in the tall grass at dinosaur time.

They don't know still yet who it belongs to and who filled it with books. Who is that person?