It is so fun to watch him discover the Harry Potter books. I was at Goodwill today and they have the hard backs for only $5 a book. He had only read the first two... but give him a couple days and number three will be under his belt too.
I was considering re-reading the series myself but that will not be necessary. No matter how many times we tell him to quit, and that it's annoying, The Brain reads out loud... and with a British accent (she says as she roles her eyes).