From the back cover:
Set in New York City two years after the nukes fell the players are tasked with restoring New York to government control.
Map of New York with damage done during the war
Map showing the districts and major streets
Details of various organizations, marauder gangs, and petty warlords fighting over the city.
Background on the city including a fortune in gold lost in the city and other aspects of life in New York after the war.