Grave indulgence

the long version

Henry Grave is an investigator for the Association of Cruising Vessel Operators. A World War II P.O.W., Henry is as cunning as he is charming, and at 85 years of age, he fits right in with his fellow passengers. Indulgence, a 1200 feet long cruise ship, is anchored off Helsinki, Finland, preparing to take on passengers for her inaugural voyage when Henry comes aboard. On the second day of the voyage, Henry is faced with solving a murder. He enlists the help of an Arabian prince, a voodoo priest, and a displaced band of hunter-gatherers to track down the killer.