From the publisher:
This supplement includes information on all the important figures, places, and secret societies in France’s capital city. Also included is information on Parisian streets, architecture, and other aspects of everyday life.
In short, Paris Gothique provides the Game Master with everything needed to run swashbuckling adventures in the city.
Contents of the book include detailed information and locations in central Paris, how to set up adventures, new personalities and secret societies, and of course new monsters and lackeys!