Undercurrent

When a beautiful musician faces deadly danger on a cruise ship, a Secret Service agent will do anything to protect her in this romantic suspense novel.
Pianist Kathryn Brooks thought she found a dream gig playing on a transatlantic cruise. But that dream is shattered when her best friend goes missing and someone starts targeting her. Good thing the handsome guest escorting his grandmother across the ocean happens to be an expert in deadly danger.
Secret Service agent Sam West vows to protect Kathryn as every corridor poses a threat and any stranger may be an assailant. With the ship's security providing little assistance, Kathryn puts her trust in Sam. Yet losing her own life is no longer her only fear. Because the closer she gets to Sam, the more of a target he becomes.