My library hold for this came at just the right time. I've read a string of books that range from completely unsatisfying to good...but nothing that I couldn't WAIT to get back to, until The Infinite Sea. 
 This one picks up nicely where The 5th Wave left off. In the beginning, things are a bit slow. There's a lot of talk, some bickering, and much indecisiveness. Then Ringer strikes out on her own to check out a potential place for the group to stay, and the book picks up steam. 
 While some of the chapters (like the last book did) alternate character perspectives, the heart of this second-in-the-series is all Ringer, and I'm glad for it. We get to know her better, a lot better. Once again Yancey knows how to develop a character, set the backdrop for a story, and then put everything in motion all at once. I could not read fast enough to satisfy my yearning to find out WHAT HAPPENS NEXT! 
 I didn't like it as much as the first one; this is more of a 4.5 than a solid 5-star rating for me, and that's largely because of the plot twist. I'm not exactly sure what happened, but either I understand it and it's super hokey, I'm confused and it's hokey, or I'm confused and it's going to be incredible. 
 It's a very good middle book, but gosh, now I can't wait for the next one. *swoon*