Island Magic. Ben Hood Thrillers, #16

Lord Howe Island, just off the east coast of Australia, has prided itself in being relatively crime free for years. With the arrival on the island of movie star Brenda Grant and a film crew, together with some twisted criminals, things are about to get very deadly. Ben Hood is hired to protect Brenda following death threats made against her by the deranged son of the island's resident witch. Ben's relationship with the 61 year old witch takes him into totally unexplored territory.
He eventually finds himself in a race against the clock to save Brenda's life as well as the life of the beautiful witch who seems to have him spellbound.