It depends on your personal taste.
How To Brew is a great book that gets into some technical detail. The first time I read it, I skipped most of it because I wasn't interested. 3 months later, I went back and ate it all up because I wanted all the knowledge I could get.
Joy of homebrewing, while the information isn't the same as the best practices you'll read about here on this site, is much more casual and geared towards someone who just wants to crank out some beer and have fun doing it.
For me personally, I"m glad I read Joy of homebrewing first, then How To Brew. I think How To Brew would have overwhelmed me as a starting point.
Then there are a zillion books that specialize in things... extreme beers, classic beers, yeast, belgian beers, creating beer recipes, clone recipes, you name it.