Summary: A Prequel to Wool, we find out how it all started or at least we start to find out.
First Shift: Legacy (Wool #6) is the start to a prequel trilogy for five books of Wool by Hugh Howey. Without giving up too much of the storyline of Wool, the setting is a post-apocalyptic world where everyone lives in underground silos waiting for it to be safe to return to the above ground world.
First Shift tells both the story of how (and a little bit of why) the silos were built and the early years of living in the silos. The main character tells both stories through flashback.
