The two best are already mentioned - Complete Joy, which you have, and How to Brew. The other book I'd recommend is Brewing Classic Styles, because it has a lot of nice recipes with good information about the character of each beer style. If you're curious about a beer style, you can read about it and grab a very basic recipe with both extract and all-grain options. I've made learned several styles using this book.
http://www.barnesandnoble.com/w/brewing-classic-styles-jamil-zainasheff/1008548059
Reading is part of the homebrew addiction. My latest find Denny's Experimental Homebrewing. Liking it!