Rising Tides by Nora Roberts

Ethan Quinn shares his late father's passion for the ocean, and he's determined to make the family boat-building business a success. But as well as looking out for his young brother Seth, the strong but guarded Quinn is also battling some difficult home truths. Grace Monroe, the woman Ethan has always loves but never believed he could have, is learning that appearances can be deceptive. For beneath Ethan's still, dark waters lies a shocking past. With Grace's help, can he overcome the shadows that haunt him and finally accept who he is?