The Glass Bottom Boat — Laura Thomas

Her worst nightmare lies in the depths below. Surrounded by the romantic paradise of her sister's destination wedding in Jamaica, Madison Grey must overcome her paralyzing fear of the ocean—and her broken heart—to start living again.  Luke Alexander, the groom's brother, is a missionary who has come to terms with a life of singleness—until he meets Madison.  Their personal connection is about to intensify when a stalker stirs up haunting memories. After Madison mysteriously disappears and the newlyweds receive a ransom note, Luke dives into action to find her. Will he save Madison in time or will she be forced to suffer her worst nightmare?