The Devil of Dunakin Castle by Heather McCollum is Book Four in the "Highland Isles" series. This is the story of Grace Ellington and Keir MacKinnon. I have read all the books in this series (and LOVED THEM!) but feel this can easily be a standalone book.
Grace is the daughter of the Earl of Somerset and has inherited an Estate down in York England but she prefers to live at a cottage on the edge of Aros village near her half sister Ava. Grace has taken to learning to heal people and with that comes some independence. But between the village people, her sister and even the blacksmith Thomas thinks she should give in to her suitors like Gavin and marry. But Grace wants more than that. Grace is looking to overcome some of her fears and go on an adventure. Also Grace would like the passion she sees with her sister Ava and her husband along with Mairi and her husband. Grace decided to travel to help Mairi with the birth of her child. Thomas elected to escort her there but along the way he started getting sick and when they stopped in a Village, Grace went to get something to help Thomas she meets Keir. Keir is traveling to find the famous healer to help his sick nephew. Keir is the youngest brother of the Chief of the Mackinnon clan on the Isle of Skye. Keir is a strong man who brings discipline to his clan members and fear in his enemies. But he does stop to help Grace when she is trapped by wolves but get hurt in the end. So Grace helps to heal him which gets Keir to thinking that she could help his nephew and he will bring a healer to his nephew by any means possible.
I am so happy to read Grace and Keir story, it just added a little more love I have for this seires!