Strong ending to one of my top favorite YA Science Fiction series. Now, I'll be honest with you, I can't say that I was surprised by the conclusion, nor was I shocked by who the traitor proved to be. I don't know, maybe I've read too many YA novels in my life, but I actually figured out most of the big plot twists long before they happened. That's not to say that I didn't love the book. I loved it SO MUCH. It was more mature than most of the recent YA books (and not only because of all the characters that Revis killed off), everything was well explained, there were no plot holes, the story line was clever and the pacing was awesome. There were maybe two moments when I thought what happened was not plausible (hey, it's a Sci Fi, if you can't take a little bit of reality-stretching, don't pick it up!), but other than that I was very impressed by how neatly Revis wrapped everything up, tying up all loose ends. 
 Bottom line is: PICK IT UP! 
 Full review to come!