Camorr is the setting of The Lies of Locke Lamora, the first book in the Gentleman Bastards series about a two-man team of conmen set in a Renaissance Fantasy world.
It is, as I wrote before, an expy of Venice at its height, but the books focus on the organization of the city’s criminal underground more than the legitimate system. Later books, however, do have more detail about the political systems of Camorr’s neighbors.