Prairie Gods (Prairie Gods #4)

The Broadacres Silver Mine explosion of 1877 and the vast treasure it supposedly buried is far more than a local legend. So many treasure hunters have died trying to find it that the old abandoned mine and its museum have been shut down. No one knows more about the treasure and the legend surrounding it than former tour guide Anna Dara. When a mysterious stranger makes her an offer she can't refuse, she agrees to take him down the mine. Unfortunately for her, the stranger is hiding dangerous secrets. Unfortunately for him, so is she.