Enigma at Pecos Mine

From publisher blurb: Your travels through Allatrama has been a rough one but you are almost to the largest "community" in the region known as Borgusburg. With any luck, you'll have a warm bed and good food in your belly soon! Alas, your arrival will not be heralded loudly... Although set in the Pangia Campaign, this adventure setting is easily adaptable to most any game and system.