From the publishers website:
Freeport is Green Ronin's signature city setting and has been home to thousands of RPG campaigns since its launch in 2000. Classic fantasy elements, cruel-hearted pirates, and Lovecraftian horror come together in the rum-fueled metropolis known as the City of Adventure. Now a new era is beginning. The Pirate's Guide to Freeport is the definitive new sourcebook for the City of Adventure, set 5 years after the events of the original Freeport Trilogy. This is a pure setting book, focusing entirely on the people, places, politics, and perils of Freeport and containing no game statistics of any kind. The Pirate's Guide to Freeport can thus be used with any fantasy RPG, and Green Ronin will be providing companion products for popular systems like True20 and d20. The City of Adventure is back and more dangerous than ever!