the knight and the dragon

It's hard to tell who was more reluctant to duel in this unconventionally funny medieval tale—the knight or the dragon.  And its equally unusual ending involves a traveling library lady.  The simple narrative in The Knight and the Dragon lends itself well to teaching story retelling to children.  One of our goals is to read Tomie dePaola’s seemingly endless treasury of works and even thought we have many of his books, I know we’ve only scratched the surface.  What’s everyone’s favorite book by him?