Going Harvey in the Big House

Aurora Award Finalist The Builders had made the House generations ago, to shelter the remnants of humanity from the poisons of the Outside. The Inners, the direct descendants of the Builders, now rule the House. The House protects the People, and the Inners protect the House. And Smoothers are the arms and legs of that protection. Big G is a Smoother, ensuring that the daily activities of the House are not interrupted by "Harveys, " citizens who suffer violent mental breakdowns in the claustrophobic House. But when Big G discovers a strange photograph of blue and white swirls of nothingness during a Harvey call, it leads him to world within the world he thought he knew-and a world outside it as well. Science fiction, dystopia, post-apocalyptic SF "Hands down, my favourite story .
I've always been fascinated by the concept of a city that encompasses what we know of the known world.