For anyone interested in urban gang dynamics I highly recommend David Kennedy's book Don't Shoot. I recently read it and it contains some amazing insights into misunderstandings that communities of law enforcement and urban neighborhoods have about each other and gangs which leads to rational but wrong behaviors that perpetuate those misunderstandings, along with some brilliant ideas to change those dynamics with examples of those applied ideas working in multiple neighborhoods across the country.

http://www.amazon.com/Dont-Shoot-Fellowship-Violence-Inner-C...