I'll be blunt: I'm not a big fan when books lecture me. And that is what this book does? Not in the setting or the premise, I think those both really worked. But that every single conversation between adults in this book was a soapbox speech/exposition.  What twists there were really foreshadowed badly, and what foreshadowing there was was more like a forecast, though I will admit that the very end was satisfyingly unexpected. The action was confused and muddled and impossible to follow. In one or two scenes Harry seemed to have fusion problems, but this was literally never expanded on it confirmed.  

This book had something specific it really wanted to say, and unfortunately, the story itself suffered for it. 

I listened to about 2/3rds of the story on audiobook, and I will say that the story worked for me a little better in audio.