Pathfinder Adventure Path: Iron Gods Part 2 - Lords of Rust

The Lords of Rust dominate Scrapwall, and their swiftly rising power threatens more than the town of Torch. For they have the support of one of the Iron Gods of Numeria, and what slumbers fitfully beneath the wreckage of Scrapwall could catapult the Lords of Rust into a new level of power if they're not stopped.