A Murder in Every Port — Bobbye Terry

Roxie and Trixie go global, cruising their way into international murder, when Roxie, wounded by Greg's inattention, drags her sister along on a five-day cruise to the Caribbean and Mexican ports of call. All she wants to do is leave her troubles behind. However, disaster doesn't stay put in Briny Bay. It follows them onboard the cruise ship and even on shore, where they encounter a murder in every port.