The print edition of Why Density? is a set of tools created by a + t research group in order to build the-americana city. These Involve practical urban-level concepts applied to specific cases. All the illustrations have been done specifically for this publication. This book forms part of the Density sèries, initiated by a + t in 2002, which became a reference for publications about collective housing worldwide. English / Español. 256 p .: fot., Color, plantes i seccions, 23,5x17 cm ., rústica