Knox‎'‎ in‎-situ studies present 50 especially significant city districts from the whole of Europe in words and pictures‎.‎ His field research focuses on typologically outstanding city districts that have developed a high degree of individuality‎.‎ Cities are the symbiosis of diverse districts‎:‎ the smaller units serve to provide an important identity function‎:‎ business centers and amusement districts such as the City and the West End in London‎,‎ technology and science quarters ‎(‎Adlershof in Berlin‎)‎‎,‎ designer districts such as the Zona Tortona in Milan and the Fashion District in New York‎.‎ Two other factors that play a major role are the conversion of industrial wastelands and new districts colored by a supranational capitalism or a sustainable or dubious planning ‎- such as the Vauban residential quarter in Freiburg in South Germany or the Lower Ninth District in New Orleans‎.‎ Paul Knox also always analyzes how and why these districts have turned out the way they are‎:‎ outlining their visible and also their hidden and often blurred "biography"‎.‎ A fascinating journey through space and time‎!‎