I really wish this series would have ended after book 2 or book 3. 
 This is just more of the same, with a message about climate in it. 
 (view spoiler)[You already know the flock gets captures and they will escape. It's not even that exciting. (hide spoiler)] 
 Only thing that kept me curious was the relationship between Max and Fang. 
 Think that you can keep kids addicted to these books longer, but I will quit the series from now on. It was fun while it lasted, and I will add the first 3 books to my own bookshelf :)