4.5 stars. 
 THIS is what I've wanted from this series since I started it. This book was absolutely what all the others had the potential of being but didn't quite live up to. There was SO much going on and finally we get some answers to questions that have been asked for the past 4 books. It was totally worth waiting for, considering the build-up and suspense made finally find out satisfactory, but I don't think I would've usually been okay with waiting this long. 
 Mac and Jericho and really most of the characters all finally reach a point with me where I absolutely love their characterization at this point. I feel like the reader finally gets some clarity on who these people are. It's really a breakthrough.