Excellent sourcebook on the cities where law and order have basically collapsed.
In this book, you get two main writeups on two cities(Chicago and Lagos, Nigeria) and several smaller ones(Gemito, Sarajevo, Geneva, Bogota and Karavan.
The write up for Chicago is great, this is an update to Bug City. Excellent stuff on its current state and possible future(and yes the Bugs are still here and there are thousands of sleeping Bugs in the city....).
Lagos is also excellent, an example of a still functioning city that has no central law and order. It is in fact, probably the center of illegal activity in Africa and one of the major smuggling centers in the world.
On the smaller write ups you have:
Gemito: The messed up Italian city states in the North, basically a hangout of warlords in a crime controlled city sprawl.
Geneva: A city under siege from AIs and its ilk.
Karavan: A moving nomadic city in Central Asia which has its own order even though it has no central gov.
Sarajevo: the product of the Euro Jihad. Devastated city under siege.
Bogota: Devastated city ala Berlin in the cold war. Divided between Aztlan(who mostly control it) and a growing area of Amazonian control.
Besides giving the lowdown on the cities it gives info on their hotspots, groups , flora and fauna(the Chicago and Lagos sections are quite interesting in this). Current situation, getting around the cities etc.