Oceans of Fire (Drake Sisters, Book 3)

The third daughter of seven in a magical bloodline, Abigail Drake was born with an affinity for water and a strong bond with dolphins. After she witnesses a murder, she flees right into the arms of Alexsandr Volstov. On the trail of stolen Russian antiquities, he's a relentless Interpol agent—and the man who once broke Abby's heart. But he isn't going to let the only woman he's ever loved slip away again.