From publisher blurb:
Underbelly: The Seedy Side of Town has 100 pages of brand new material exploring the criminal element of any town or city. Not your typical Thieves' Guild, this is a compilation of criminals, encounters, and locations that make any campaign come alive.
• 13 unique criminal enterprises
• Multiple plot hooks for every location
• 50 Detailed NPCs and Monsters
• 15 New Magic Items
• A Completely New Bard College
• A Gossip Generator that works for ANY game
• Expanded Rules and Examples for Tracking Down People and Places
• Newly Expanded Chase Rules and a detailed example
• Rules for New Games of Chance
• Several New Poisons and Their Recipes
• A Variety of Maps and Methods for Using Simple Geomorphs
• Guidelines for lowering or Increasing the Difficulty of Almost Every Encounter