"Why are we drawn to certain cities? Perhaps because of a story read in childhood. Or a chance teenage meeting. Or maybe simply because the place touches us, embodying in its tribes, towers and history an aspect of our understanding of what it means to be human. Paris is about romantic love. Lourdes equates with devotion. New York means energy. London is forever trendy. Berlin is all about volatility. Berlin is a city of fragments and ghosts, a laboratory...