I would agree, that's a great book. After you've read that one a couple times and you want to read yet another, get Ray Daniel's Designing Great Beers, the first half is informative, kind of like a how to brew book. The second half goes through many popular styles of beers, discusses history, commercial examples, and the National Homebrew Competition examples. Between How to Brew and Designing Great Beers I don't think my beers would have turned out as good as they do.