When I first heard about this book, I really wasn't all that interested. In general, aliens really aren't my thing; I can count, probably on one hand, the amount of books I've read featuring them. I don't know why, it's not like I've had bad experiences with them or anything. They just don't jump out at me. But then I started seeing advertisements for The 5th Wave pretty much everywhere I turned. And I must confess: when something is extremely hyped up and everyone seems to love it, I usually get involved at some point to see what all the fuss is about. This was getting very positive reviews in advance, so over time I got really excited to pick it up. I read a library copy, but then I went out and bought my own, because I definitively had to have it. 
 There isn't a whole lot of action going on in maybe the first third of the book, because a lot of that time is spent setting up the world and explaining the first four waves, and what they were all about. Normally, all the information at once would annoy me a little, but Yancey does a really good job in giving his writing this underlying sense of tension. I honestly felt a little nervous as I read this; The 5th Wave is the first alien book to genuinely creep me out somewhat. Once you get all the information about what it going on in the story, it makes the rest of the book feel really solid and well-thought out. The prologue is pretty intriguing as well; it grabbed my attention immediately, and it's probably part of the reason that the first third didn't bother me. 
 I really enjoyed getting to know all the characters, especially Cassie. It's probably very realistic for a sweet, mild-mannered person to completely morph into something else in the face of apocalyptic disaster. I felt sorry for her, but I also loved her sarcasm throughout the book; it made her a much more likeable character. It was pretty much the comedic relief in an otherwise tremendously dark book. And I always love it when there's a strong bond between siblings in a story, so I was really touched by her moments with Sammy. Zombie's POV wasn't quite as interesting for me, especially not at first, but I grew to like him eventually. Towards the second half of the novel, the pace picks up a bit and action abounds. I really appreciated the intensity of the storyline; the stakes felt so high, and they were, what with all humanity almost wiped out and everything. The ending of the book isn't wrapped up with a nice shiny bow, of course (this is, after all, a series), but I got a good sense of closure and I'm glad that's where Yancey chose to end it. 
 It was an interesting plot most of the time because a lot of the things "revealed" throughout, the reader already knows from previous chapters. And while that may seem boring, it somehow wasn't. I did make a lot of educated guesses while reading, and while I was right most of the time, like I said before, there's just this aura of suspense to the book that makes that fact irrelevant. Overall, The 5th Wave lived up to my expectations (which is actually really impressive, since they were very high), which is awesome, because it feels like something rare. If I absolutely had to pick something to gripe about, I would say that I wish the romance was a little more developed. I liked Evan Walker, but I wasn't crazy about him. His feelings for Cassie were just a little too rushed. I also wish there was some kind of header in the beginning of each chapter to tell us who's narrating. Eventually I got used to it, but at first it was kind of irritating to be bouncing around in different people's heads with no warning. 
 5 stars