Urban Living at the Beginning of the 21st Century in Amsterdam, Hamburg and Vienna' is based on the EU-subsidised research project "Insecurities in European Cities" (InSec) and on the data collected in the framework of this study. While the InSec project combined Amsterdam, Budapest, Hamburg, Krakow and Vienna in the one research, the present study centres on Amsterdam with its areas De Baarsjes and De Bijlmer, while using Hamburg with the area Wilhelmsburg and Vienna with the district Leopoldstadt for comparison. The book is the result of observations dating from the time of the InSec research and of various developments that have taken place during the following about 15 years. Overviewing the mass of details introduced and referred to, one recognizes an apparent arrangement of important subjects, the following themes respectively: the influence of the time factor, the significance of diversity, the extent and importance of interaction and of the need of more interdisciplinarity