A good sequel even though it didn't reach the amazingness that is The 5th Wave. I really love Rick Yancey's writing style, all the playing with words and messing with your head. Awesome! I love that I have no idea how this whole trilogy is going end. I definitely didn't see the end's big reveal coming even thoug it makes sense. I'm a bit sad that we didn't get to see that much from Cassie's point of view. It's always A+ and it makes you think and it makes you laugh, even in the middle of serious moments. I just love her attitude. And she and Evan, all the interaction between them is perfection! Not that there's something wrong with Ringer, she's a great character, but Cassie makes me laugh! 
 There were action and stuff happening in this novel, but it kind of felt like just a bridge between The 5th Wave and the last book. For me that's the main reason why it didn't reach The 5th Wave's level.