Thanks, we regularly go to the library and talk to the librarians there. They know him now so don't do the whole "why are you getting these books for your 4 yo?". Geronimo Stilton is good, we just got a few of those. He loved flat stanley, read it a few times. A few of the other ones we got were a little advanced for him. he would sit there through it while we read, but he had no idea what it was about, I could tell. The Pizza the Size of the Sun is great too. He is really into the Magic School bus stuff, I got a magic tree house one that I will try with him, just not sure how he will like it yet. It's worth a shot.