Bug City details the events that shook Chicago in mid 2055, provides a detailed description of life in the Containment Zone, including game information on the changes in Chicago's physical and magical nature, profiles of the city's importanat residents, and expanded rules for the city's terrible ravagers--the insect spirits themselves.
One of the defining setting books for the Shadowrun RPG.
Thanks to * spoilers for an over 30 year old sourcebook * , the city of Chicago has been placed under quarantine. This book details life inside the Chicago Containment Zone from the point of view of those stuck behind the Wall.