Very rarely does a second book in a trilogy hold its own and be as good or better than the first book; however, The Infinite Sea absolutely does it. I was blown away by the 5th Wave and held high hopes for the sequel, but I never would have expected to like it as much as I did. 
 The Infinite Sea is told by alternating perspectives. Normally, I loathe that style, but Yancy does an awesome job of it. The primary view point is Ringer's as opposed to Cassie in this book. I wasn't a huge fan of Ringer in the first book and I don't love her in this one either, but I respect her. Learning so much about her in this book, helps the reader to understand her so much better and why she tries to always act so tough and put up all those walls around her. 
 I was also pleased that the "love" story took a back seat. I like a good romance as much as the next girl, but Aliens are taking over the earth, we have to survive before we start mating! 
 Rick Yancy does an incredible job with this story and takes it to places that I believe will be truly shocking and unexpected. I think this is why I liked this book so much. I wasn't prepared for the big reveal, much like I was not prepared for what the 5th wave is. 
 Typically, I am not a fan of Aliens taking over the world sort of books, but I would recommend this story to anyone who enjoys fully developed characters, wonderful world building, and articulate prose that leave you wanting for more.