House in White Mist — Melissa Napier

The Secret of Castlewarren

Young, vivacious Dorothea Devon accepted a job as companion to the aging Victor Foxhill and tried to forget the tragic death of her fiancé.

But the enormous, bleak Castlewarren estate where Foxhill lived harbored a shattering secret. As the days passed, Dorothea found that she was the ploy in a fiendish plot -- and the human key twin doors of horror and hypnotic fear!