While Dudley had come to a certain appreciation of Potter's world and of his cousin himself, that didn't mean that he like either. He didn't like being trapped in this place. He didn't like not being able to see his friends.
He certainly didn't like being reduced to reading for entertainment. And not even proper comic books. Actual books with nary a picture in them.
When Miss Jones came back, he looked up hopefully. Maybe she brought more biscuits.