Shift: (Wool Trilogy 2)

In a future less than fifty years away, the world is still as we know it. Time continues to tick by. The truth is that it is ticking away. A powerful few know what lies ahead. They are preparing for it. They are trying to protect us. They are setting us on a path from which we can never return. A path that will lead to destruction; a path that will take us below ground. The history of the silo is about to be written. Our future is about to begin.