In Ralph Ellison's novel The Invisible Man he convincingly describes a society where he is not seen. This happens today all over. Aborigines are invisible to white Australians. Muslims are invisible to Christians and on it goes. The City just takes reality a little further and has a state imposed invisible "other class". If you don't follow the plot first time (you are not alone) I recommend a second look and you will pick up the subtle detail in a better appreciation of the fabric being woven here.
Review of The City and the City
