Shift by Hugh Howey
Oh, I loved this book. I loved Wool for it's higher pace story-telling, but Shift I loved just as much for the ingenuity of the story development. So far the series is my favorite in the post-apocalyptic/dystopian genre.
P.S. I truly wish this series were made into a movie.
 (Wool, #6-8) - Hugh Howey)
