Dance with the Devil - Dean Kootz

Katherine Sellers came to Owisden in the winter, to be the secretary-companion to Lydia Boland, one of the wealthiest women in the country. The job was an exciting challenge for Katherine, and a needed change from the events she'd sooner forget. And her new employer was a charming and gracious lady. If only all of the people of Owisden and the little mountain village that huddled against the estate for protection were so nice, Katherine's happiness would be assured. However, beneath the charm stirred other emotions, other forces. There was evil in that mountain valley, a brooding evil that worshipped at a dark altar... an altar that had been built for unspeakable sacrifice! And Katherine was marked from the moment she arrived - marked to die!