I've been wanting to read this book for a while and it was pretty great! I liked the concept of what Gearbreakers do and how the resistance is working to take down the mechas. I was intrigued right away at the end of Sona's first chapter when you see her real intention of trying to dismantle and hurt the system from the inside. I listened to this via audiobook and I think that's what made me knock down a star. Both narrarators were great, but they were very similar in style and it took me a long time to differentiate between the two. I also had a really hard time understanding when listening the difference between present time and flashbacks during the first quarter of the book. I struggled a bit with the pacing, feeling like there was a lot of ""and suddenly!"" moments. I do understand that during apocalyptic war survival, there will be a lot of stuff like that happening, but I feel like sometimes it happened so quickly not only to the characters but to the reader as well and I felt confused and would have to rewind to make sure I didn't miss anything. the book ended with an intense cliff hanger that basically requires you to read the next book. I personally don't mind that about books, but I know it's a turn off to others. I hope to check out book 2 in the future!!