Book 6, and the conclusion, of the Iron Gods campaign: More than treasure waits within the alien chambers of Silver Mount - here, the greatest of the Iron Gods dwells, preparing for its triumphant emergence after eons of preparation. Having recruited allies from across the land and cowed the brutal rulership of Numeria’s capital city for the time being, the heroes are ready for an expedition into Silver Mount’s mysterious interior. What strange perils from beyond the stars await the PCs within the metal walls of one of Golarion’s most legendary dungeons? In trying to save Numeria, could the heroes be walking right into a trap?