DS is a book worm! He likes funny ones or books that are very far fetched. Some of his favorites are:

Horton hears a who
Peter Pan
Possum Magic
Horton hatches the egg

He will sit through a whole story with a lot of words and one main picture.
When buying a book, i look for quality, like i think about how my son will throw it around and things like that. Whether it will last or not. I also like books that have a meaning behind the story.