Sometimes in a movie, the movie director will show you glimpses of the end and then go back and back-fill… The first book (Earth Dwellers) works that way…presenting the underlying theme of rebellion and how it all ends.
The rest of the books fill in the backstory until we arrive at the end again, where it all started… with rebellion and self-will.
I’ve endeavored to keep the series biblically driven (expositional) as well as illustrated well (you’ll see this in the second book especially), and somewhat anecedotal (personal experiences woven in).