Jan Gehl

Aside from his built work in Copenhagen etc. Gehl architects have carried out many studies of life in the city over many cities across the world. His books, particularly his Public spaces- Public life series mat be of particular value in this unit, as they document the successes and shortcomings of life in the city.
A list of these books can be found here:
http://www.gehlarchitects.com/#/159794/

This may also be of interest, placemaking for communities, based on Gehl's work:

http://www.pps.org/jgehl/