From publisher blurb:
Cat’s Cradle stands at the intersection of a caravan and river route, which brings in mysterious travelers, unscrupulous grifters, and -- quite often -- dangerous villains.
A Place of Dangers and Opportunities
A walled town of roughly 4000 citizens, Cat’s Cradle is a modular resource that can be used any time you need a town at the intersection of trade routes. This book describes the important locations in the town and its immediate surroundings, such as the “salt” mines formed by the ancient intersection of some massive interplanar beast with the material plane. The otherworldly mineral deposits left behind are used in Cat’s Cradle’s thriving alchemy-related businesses.