Hugh Howey 
First Shift: Legacy 

The incredible first part of the follow up to bestseller Wool.Donald Keene has been recruited by the government to design a shelter. He has been told that it is just protocol. That it won t really be used. That it is just-in-case .It is underground.Over fifty years later Donald s design has been realised and the last remnants of mankind live in his silo. But no one can remember what life was like before. In fact, they re forced to forget. One simple pill erases a memory. And with it, any chance of hope.