The Scot’s Oath by Heather Grothaus

In the shadow of a damning legacy, these proud sons take medieval Scotland by storm . . . and surrender to love’s saving grace.
When Padraig Boyd learns he is the sole legitimate heir to a Northumberland manor, he flees the impoverished fishing isle of Caedmaray to claim the estate and clear his missing father of criminal accusations. Arriving at imposing, mysterious Darlyrede House, he faces a formidable enemy in the castle’s occupying lord, a challenging battle—and an unexpected helper . . .

With deadly traps awaiting him at every turn, Padraig finds an ally in Beryl, a beautiful maidservant who schools the rugged Scotsman in the rules of nobility. But as a tempting passion draws them in, so do the secrets that brought the cunning lass to this house of scandal and deceit. Unmasking her intentions is a high-stakes
game—one that may arm Padraig with the most dangerous of weapons: the truth.