It took only two weeks for the now-nine year old to get through "Harry Potter and the Half Blood Prince." He finished it this morning. He read it all on his own, putting in several 100+ days. There are 168,923 words in it, which brings his HP word count up to: 885,943.
He also is trying to beat his sister through the books. She had a big head start, but he has come on strong the last few books. He started the sixth at about the same time she started the seventh. He got through his book, while she's only about 200 pages into hers. He hasn't exactly been trying to play fair; he keeps stealing her copy so she can't read it. Now he's hot on her tail and will likely pass her in the next few days.