America's Queen of Suspense—Mary Higgins Clark—joins forces with her daughter Carol—bestselling author of the Regan Reilly mysteries—in this fast-paced novel set on a special holiday cruise that sets sail from Miami the day after Christmas . Alvirah Meehan, lottery winner turned amateur sleuth, and private investigator Regan Reilly are guests, along with their spouses, on the "Santa Cruise." The cruise is a gift from Commodore Randolph Weed to a select group that "has made the world a better place." His largesse is prompted by the desire to create a buzz about his new cruise ship, the Royal Mermaid , as she sets out on her maiden voyage. Alvirah, Regan, and her new husband Jack—head of the NYPD Major Case Squad—are joined as guests on the cruise by a mystery fan convention, celebrating "a ghost of honor," as well as ten men who donated time playing Santa Claus, now hoping for a restful post-season. That tranquility vanishes when two Santa suits disappear from a locked room, a storm develops, and an attempt is made on a passenger's life. As the Royal Mermaid sails through troubled waters, Alvirah, Regan, and Jack uncover clues that lead them to dangerous criminals not on the original guest list...