I think I would have completely loved this book if it had been an adult SF book instead of YA, because some of the YA tropes were, while not objectively bad, not so much to my tastes. It's definitely a dark YA book though, and a great alien invasion premise well implemented. I wish I hadn't listened to the first portion on audio though, I think I would have preferred to be able to flip back and forth through the book as revelations were made. I wasn't really expecting it but I'm really looking forward to finishing the series!