Eight-year-old Jack and his younger sister Annie use the magic treehouse to travel back to the Middle Ages, where they explore a castle and are helped by a mysterious knight.
When Eddie visits his dad's castle, he takes his Uncle Morton's pet dragons, Ziggy and baby Arthur, with him, but Eddie isn't ready for the mayhem they cause.
In their magic treehouse, Jack and Annie are again transported to King Arthur's realm, where invisible beings, giant ravens, and mistaken magic spells have a duke's castle in an uproar on Halloween night.
Contains a brief, illustrated, history of Ludwig II, King of Bavaria, and his castle, Neuschwanstein, built into the mountains, and includes information on Eighteenth century Germany, how the castle was constructed, and a time line of events.