Betrothed to the Beast by Elina Emerald

Highland Laird Beiste MacGregor is a ruthlessly ambitious warrior with the viciousness of a beast. He has little interest in women beyond the bedchamber and even less interest for weak-willed men. On order of the Red King he reluctantly travels with his men to the Lowlands to formalize a Betrothal to a woman from clan Dunbar. He cares naught who she is as long as he satisfies the King’s requirements. He is not prepared for the troublesome but striking clan healer he meets on the way, who not only infuriates him but stirs something deep within his soul.
Amelia Dunbar is a clan healer and the illegitimate daughter of the Earl of Dunbar. When she is not serving as a Lady’s maid to her half sister, she is tirelessly attending to the sick in her clan. Amelia has plans to find her mother’s people in the Highlands and is about to embark on her journey when she is waylaid by the arrival of fearsome warriors. One warrior they call ‘the Beast’, rouses her ire and sets her heart racing at the same time.