The Maiden Ship by Micheline Ryckman

Dain Alloway was only nine years old when he began a new life with his father, sailing aboard The Maiden. Eight years later, the aristocratic city-boy turned merchant-sailor feels like he lives with one foot on land, and one foot in the sea. Life floats smoothly by until the night he wakes to find a mysterious woman in his cabin.

The events that unfold after her appearance transform Dain’s world. Now, hunted by empty-faced demons, he finds himself thrown into a dangerous web of intrigue and magic. As the crisis grows, the young sailor discovers powerful gifts buried deep within, talents that might shift the tide of a centuries-old war. Whether or not he’s ready, Dain will have to risk it all for the salvation and freedom of those he loves.