1.5 -- Initial verdict: Even though I started on The Infinite Sea just after I completed The 5th Wave, I had long since gone out of the world of The 5th Wave, as I wasn't that impressed by it. But that was a bad decision, since The Infinite Sea doesn't repeat or introduce you to what's happened before. And let me tell you, that's not cool! Especially when the tradition is to publish the sequel the year after (which I understand), but time has passed, and the likeability for people to remember something that they have read the year before diminish. With other words, it took me a while before I was back into the loop (like two-thirds... -- 200 of 300 pages). 
 Two-thirds of the book is mostly just the characters interacting and damn, that was not so enjoyable. It was like a repetition of some endless mantra. Though the redeeming part of The Infinite Sea is that the plot finally shines, and I feel like Yancey haven't churned out something to be a part of dystopia/apocalyptic/science fiction-wave. There's actually a plot and a slight logic to it (more than The 5th Wave did for me). 
 So to sum it up. The last remaining one-third of this book was actually engaging for me, and the plot growing is the only reason for the 0.5 star bump up from 1 star -- isn't that telling? But the cool plot development is so let down of repetitions of recaps from the previous book and boring interactions that does so little for The Infinite Sea alone. 
 Plot-wise is the only thing that will keep me interested in reading the sequel to The Infinite Sea... If I'll ever bother to read that. And lastly. Thank God, that I'm borrowing this copy and the copy of The 5th Wave from the library, 'cause I would never buy them for myself -- money wasted on books that I don't love.