All I can really say about this without giving anything away is 
 EEEEEEEEEEEEEEEEEEEEEEEEEEEEEE!!!!!!!!!!!!!! 
 I loved this book. Seriously. I'm not even into vampires really. And it took me awhile to get into the series in the first place. After I read the first 3 I got this weird urge to go see if my local bookstore (aka Walmart) had the fourth, and they DID and I READ IT IN AN HOUR (not really it's actually quite a long book but it felt like it only took an hour because it was SO GOOD). 
 But I don't really want to discuss anything else because if you haven't read the others then it ruins stuff. You know.