This is a story where the dragons were abused by an evil wizard and in revenge have killed all humans and become as bad as the wizard ever was. The fairies, elves, dwarves, centaurs, and so on desire their freedom back to the state the world was in before the evil wizard appeared, was killed, and nasty dragons living on revenge took over. The desire is to go back to when there was a good king who lived his people. It’s a children’s story. So, it’s not complex, a bit obvious, but fun.
Spiritually, there is nothing strongly good or evil. The spiritual levels of living are not mentioned at all. But the forgiving, helping, and the actions in general of the good characters are strongly and positively moral. Evil is curtailed in description to avoid scaring children. The results are positive and uplifting. The good witch and her son save the day. In a Christian setting there is a lot of explaining to do to avoid spiritual confusion in the minds of young readers. Simple things like: there is no such thing as a good witch.
This is clearly a children’s story for pre-teens mainly. For a good reader, it’s a very quick read.