The Dragons Slayers is a both a musical and a children's book based off it (the latter written by Bruce Coville). It's the typical tale of a princess who needs to get married soon. Her parents are in despair, as she is not interested in anyone. Along the way, the Princess-disguised-as-a-boy runs into Elizar (who is really the Kingdom's oldest squire), his page, Brian (who has a birthmark that could explain a lot of things), a talking bear, fox and cat and the one who created the dragon in the first place. A CD with the songs from the musical can be bought from the website here.