Dark Passage The Hannah Ives Mysteries, Book 12.

When a family cruise ship vacation goes from overjoyed to overboard, amateur sleuth Hannah Ives dives in to solve a mystery. Hannah, her sisters, and fourteen-year-old niece Julie set sail from Baltimore on a bonding cruise, and have a dramatic first night when Pia Fanucci, a bubbly bartender magician's assistant whom Hannah befriends, narrowly escapes injury during an illusion. But while Pia may make light of the incident, it's no laughing m...