That's the exact issue-- I'm not sure I'll be able to stop him at book three. Tonight, I mentioned that I've heard they get really scary and that there are deaths later on. He reminded me that he bawled at Charlotte's Web but that he still rereads it every couple months. I know that HP and CW are so, so different, but I'm thinking I'll see how he regulates himself on this one. I remember I read voraciously as a child and read upper level/"too mature" material and did fine. It IS different than TV, because you can gloss over the uncomfortable parts. I'm going to read it with him and see how it goes. I told him he can stop if at any point he is not enjoying it and I will save them for him in a special spot. We shall see!