Hostages of Fate — Joyce Johnson

On a remote Scottish island, Cressida Bellingham seeks peace and solitude. Instead, she finds adventure and danger when she meets Jon Grant, a man convinced the key to his financial ruin lies in Quoyne House where Cressida is staying. Cressida and Jon are strongly attracted, but prejudice and suspicion threaten their relationship. Eerie happenings on the island intensify the mystery, and only if this is resolved can they face their personal dilemmas and find happiness together.