We have a few of these books: The Complete Peanuts (various years). They’ve been great for all the boys. The older kids have stretched their vocabulary — Snoopy, Linus, and Lucy use pretty big words — and the younger ones have gotten in some practice reading without even realizing it.
My two youngest guys are both good readers, but it’s almost like they don’t know it yet. They balk at reading the books that I’ve had their older brothers read. In order to build their confidence and avoid frustration, I’ve had to change tactics.
I have found a great deal of success with your friend and mine, Charlie Brown.
These collections are a little pricey, but we’ve saved them for Christmas and birthday gifts, and they are always greeted with loud cheering when unwrapped.