2 stars: It takes a lot for me to 2 star a book, especially one that I read from page one to the end in less than a day. I was engaged, and now I am furious. 
 WORLD BUILDING So the writing is on the wall, yet the author never, EVER explains what the writing means. Over and over again Logan says, "You really should read this. Let me explain what it means." "I don't want to know. I don't have time for this. Let's go climb through some more air shafts." 
 I WANT TO KNOW WHY Why this all began. Who they are. Who the outsiders are. Why the outsiders were exiled. It was so washed over: "I don't want to know," is thought by our main character over and over. Well, this READER wanted to know, as you are my guide into the world through the book, I don't give an F if you don't want to know. Tell me anyway. Why am I reading the book? TO KNOW, that's why. It is your job as the author to make sure your narrator TELLS the story. thanks an f'n lot. 
 My desire to know the history is what kept me engaged as I read, reading faster and faster, wanting to know. I didn't care if they ever landed. I just wanted to know the HISTORY!!! What is a book that is based on a history if the history is never shown?!? 
 What is it, you ask? 
 a waste of my time, is what 
 Is there a 3rd book in the works to explain this? NO. No, there is not. This wasn't a cliffhanger by any means. As a reader, we are left at square one as we were at the start of book 1. Other than a change of leadership(without the reader knowing WHO is in charge), and more questions left unanswered, the journey for the reader was pointless. 
 This read like an author stringing the reader along to gain their attention for another book, only to decide they didn't feel like writing another book. 
 Really, isn't a story the WHO, WHAT, WHERE, AND WHY? Yes? Well, this story doesn't hit any of those... AT ALL