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There are four books in this series?! Look, I really enjoyed this book. Superheroes? Yes, please. Zombies? OF COURSE! Both in the same book? ABSOLUTELY!! This book did a great job of blending those two tropes and making it interesting and making me care about the characters. That said, I sort of feel like the ending of this book is perfect. Obviously, the future of humanity isn't totally secured and there's a lot more story that could be told about this community. I'm just not sure that it needs to be told. I feel like anything after this is a sequel just for the sake of having a sequel, which I suppose I can understand from a writerly point of view, but I'm just not sure I'm interested in as a reader. The ending of this book gives the reader enough hope that we can create our own future without needing Clines to spell it all out for us.