Philip K. Dick - The Penultimate Truth

World War III is raging - or so the millions of people crammed in their underground tanks believe. For fifteen years, subterranean humanity has been fed on daily broadcasts of a never-ending nuclear destruction, sustained by a belief in the all powerful Protector. But up on Earth's surface, a different kind of reality reigns. East and West are at peace. Across the planet, an elite corps of expert hoaxers preserve the lie.