Island of Shadows — Elisabeth Beresford

Intended as a peaceful respite, April Blake's summer job at the hotel on the Isle of Jervois becomes a series of dangerous adventures...and confusing romance...as she finds herself drawn into the powerful undercurrents of intrigue among the aristocratic families of the island. Two men vie for her: Paul Olivier, grandson of the hereditary president of the island...and his distant cousin Armand, who exerts a powerful appeal despite his rather sinister manner. Caught in a web of love and suspicion, April faces the ultimate danger before the dark secrets of the island...and her own heart...are at least revealed.