What a beautiful cover for such a wonderful book! The Wyrm was one of my favourite characters; very fun, wise, and quite off the wall as far as dragons are concerned.
Splendid. Perhaps some gold accents in the background knotwork would help, but seriously I have never illustrated anything much in my life, so that suggestion should not hold much weight. I might also want to look at the story--you have sparked my interest, which is the mark of a good book cover. Keep going.