I'm not even sure why she wrote this 3rd and final installment. Yeah, stuff happened in this book. As we saw at the end of Pandemonium, Alex has come back "to life?" so now we essentially have a love triangle. We get a dual POV of that of Lena (out in the Wilds) and Hana (after she is cured and waiting to marry her pair, Fred who is becoming Mayor of Portland). Lena, Julian and Alex head out with the others to find happiness (I guess) in the Wilds. But, what really happens? 
 This book actually felt like a middle book, not the finale! I was utterly disappointed with the ending. As an avid reader or at least an avid enjoyer of dystopian YA fiction, I expect my story to have an actual ending, where something happens, or at least we are given the impression that something will surely happen. That things are put into motion that will cause real and significant change. One small wall coming down in one small city in the entire country of the US does not instill real, lasting change, at least in my perspective. 
 So, this book gets 2.5 to 3 stars total for an entire missed ending.