I am issuing my first Fan Boy Alert. It is important to note that this following review may be tainted by the fact I believe that Hugh Howey is one of the best authors around at the moment.
Shift by Hugh Howey
Very rarely does a sequel out shine the original but Shift achieves this and kicks it up a gear. Shift answers all the questions left from reading Wool and the answers make for a fantastic story. Hugh Howey lets us in on the why and the how humanity finds itself living underground, and why each silo believes they are the only ones. As the plot unravels it is teased out in such a way that you don't want to put down the book. Big brother is watching and the truth is as shocking as the lies he tells.
5 BIG Stars