Ptolus: DM's Companion

From the back of the book:
What’s it like to actually live in the city of Ptolus? What’s the typical home like, what do people do for entertainment, and what kinds of tools do they use? This book gives the reader an idea of how it feels to walk the streets of the City by the Spire.
Besides learning what life is like for an average Ptolusite, you’ll also get a feel for the life of an adventurer in Ptolus. Other chapters delve into Imperial law, scientific wonders (including firearms, clocks, printing presses, and more), and chaositech,
the evil twin of technology.
This DMs’ resource also discusses how to plan and run a campaign in the Ptolus setting. It lays out some differences between urban campaigns and other types and offers some valuable new rules material: an assortment of monsters, magic, and prestige classes needed for the Ptolus Campaign.
This is one in a series of nine Ptolus PDF releases from Malhavoc Press. When used together, they comprise the entirety of the Ptolus print book. Each one is also usable on its own for city-based fantasy d20 roleplaying campaigns.