I really really really love these books. 
 I don't usually like this type of book, but something about it is just really great and thrilling and you just don't want to put it down. 
 So, I'm really glad that in this one we got to see what was happening on the outside. In fact, significant shit happens in this book. (view spoiler)[First, we get to see everything that's been happening on the outside. Before the whole series had been based around what was happening on the inside, not the outside or what was happening to the dome itself. Then it goes clear at the end and I'm just like THIS IS AWESOME (hide spoiler)] 
 Overall, I'm really excited to find out what happens now, with all the significant events at the end of the book.