Distress signals a novel
(Large Print)

"The day Adam Dunne's girlfriend, Sarah, fails to return from a Barcelona business trip, his perfect life begins to fall apart. Days later, the arrival of her passport and a note that reads 'I'm sorry - S' sets off real alarm bells. He vows to do whatever it takes to find her. Adam is puzzled when he connects Sarah to a cruise ship called the Celebrate--and to a woman, Estelle, who disappeared from the same ship in eerily similar circumstances almost exactly a year before." --,(Source of summary not specified)