What it says on the back of the book
King John - Rich, but greedy. He has all of England.
The Abbot - Rich, but rude. He has a problem.
Jack - Poor, but clever. He has nothing at all (except a scruffy dog).
King John has given the Abbot three puzzles. If the Abbot gets them wrong, King John will cut off his head! Can Jack save the Abbot?