Philip K. Dick 
Penultimate Truth 

In this dystopian novel from the author of The Man in the High Castle, humanity is forced to live underground while a great secret hides above them.In the future, most of humanity lives in massive underground bunkers, producing weapons for the nuclear war they’ve fled. Constantly bombarded by patriotic propaganda, the citizens of these industrial anthills believe they are waiting for the day when the war will be over and they can return aboveground. But when Nick St. James, president of one anthill, makes an unauthorized trip to the surface, what he finds is more shocking than anything he could imagine.“At a time when most 20th-century science fiction writers seem hopelessly dated, Dick gives us a vision of the future that captures the feel of our time.”—Wired