While I really enjoyed the first two books in the series, this seemed to be filler. It mostly focuses on two new characters that I didn't really feel all that attached to, and the "Human Crew" which I just found annoying because we already have two protagonists. They also added in characters, that while they may play a role in the next books, really did nothing for me (the Island kids). Though, I do have to say that Astrid had a lot of self-realization in this book, and hopefully that will carry over. I will read the next book when it comes out, and hope for the series that the first two books set up.