Oh yeah, I love that manga! I got up to about half of book three.
Why half, you ask? Well, we were in a bookstore, I didn't feel like spending 10 bucks, and the other people I were with wanted to leave (can't imagine why, though...).
Anyway, it's an awesome series. I should start reading it again. Lately I've been to obsessed with video games to read anything. XD