For as long as humans have gathered in cities, those cities have had their shining--or shadowy--counterparts. Imaginary cities, potential cities, future cities, perfect cities. It is as if the city itself, its inescapable gritty reality and elbow-to-elbow nature, demands we call into being some alternative, yearned-for better place. This book is about those cities. It's neither a history of grand plans nor a literary exploration of the utopian...