Book One is Sizzle at Sea. Here's a little about it:
All heiress Kara Mikos wants is a vacation cruise and a hot shipboard fling. When her father phones to say there is a plot to kidnap her, she brushes it off as another of his many attempts to control her life.
Private security expert Harper Long doesn’t mean to fall for his client’s sexy daughter but what better way to keep her close enough to protect? Granting his libido free rein comes with a price, though—a treasure he’s not willing to lose.