This was okay. This book was part of a trilogy. Emphasis on the "series" part. 
 I felt like this book was incomplete. Then ending was really fast, and it ended up feeling like it was part one of a story. The ending, even though it felt incomplete, had a lot of tension, which I liked. 
 Also, the whole time, the characters were claiming that they could stop the war. It was up to them to stop the war, they needed to stop the war, etc. So I kept reading, to see how exactly they could "stop" the war. To me, the ending sounded like the war was still going on. Idk. 
 Aren't there supposed to be some people who are against the war? Instead, pretty much all humans are "for" the war, like everyone hates the aliens. Besides the main characters, it was like everyone else supported the war. Okay, most people will probably support the war with the aliens, but everyone? It sounded less realistic like that.