In this radical new look at the theory and practice of urban design, Christopher Alexander asks why our modern cities so often lack a sense of natural growth, and suggests a set of rules and guidelines by which we can inject that `organic' character back into our High Streets, buildings, and squares. At a time when so many of Britain's inner cities are undergoing, or are in need of, drastic renovation, Christopher Alexander's detailed account of his own experiments in urban-renewal in San Francisco makes thought-provoking reading.