What I Loved: I really liked how we were thrust, once again, into the world of the hybrid institutes, with this one being even worse than the last. Everything felt more dangerous and more "high stakes" than it did before. I also like how much Addie and Eva have changed over the course of the series. I do like Eva more than Addie though, she just seemed like the stronger one, despite being the recessive sister. 
 Left Me Wanting More: I felt like, with most "last books" lately, the majority of the book kind of drags on. I will say that this only happens for about half of the book, with others it's usually two-thirds of the book. The first half sets up the scene and nothing much happens, but the second half has quite a bit happen in the way of the hybrid revolution and even though I could've used more, I was satisfied with the ending. 
 Final Verdict: I think this was a pretty good ending to this series and I definitely liked this book a lot more than the second book. Everything was just intensified and I felt a bigger sense of urgency in this book that I didn't get from the others. Even though I would've liked to have gotten more of a sense of the hybrid dynamics overseas, I still think this for a sci-fi/dystopian series, this one was pretty good.