This one wasn't as confusing as the first book, simply because I'm more use to Candace and her "sisters". I'm still not too sure about Patrick (and would have been a lot happier without one of the "sisters" having an odd crush on another character in this book). It wasn't quite a love triangle, but it getting close. Despite the almost love triangle, I liked this one more then the first one.
Shiro has changed between the start of the first book and the end of this one. Candace has changed too, although I think we spend more time in Shiro's head in this one then the first one. I think there's some unplanned re-integration going on, although it's not stated in the book.