Harp on the Willow, Mount Laurel Memories Series by B J Hoff and published by Harvest House Publishers.
Dr. Daniel Kavanagh travels to Mount Laurel, West Virginia to honor his good friend. He enjoys the town and decides to stay and set up a medical practice. A scarlet fever epidemic hits the community and the physician at the local mine company abandons his post. Daniel feels obligated to help a severely ill 9-year-old girl. He meets Addie Rose Murphy, who has a gift for caring for others. When a receptionist and assistant position become available at his office, since she wants to train to become a nurse, he immediately thinks of Addie. This could become more than a nursing job as the two spend more time together.
