My son likes it. we found a rock in our yard that looks like an egg so this was a big hit.
It is about the right length, not too long, not too short. it has good illustrations.
I think my son also likes it because a little boy gets to be the dragon's mother. He was relunctant to accept the news that boys can't be mommies when we discussed where babies come from, so i think that is part of the appeal of this book for him. also dragons.