The Amazon's Gold

From the publisher: "The Amazon valley is nearby, just a few day's ride. Of course, it's just an outpost of their exotic civilization, an outpost here in the more common lands, but there is the fabled gold mine. Now a long Amazon barely makes it to town on her war horse, goblins and their dreaded war hounds are coming here next. The only way to head them off is to send brave adventurers into the breach, into the valley of the Amazon's Gold."