The Girl in the Gatehouse by Julie Klassen

From Booklist: "It might not be much, but the abandoned gatehouse is Mariah Aubrey’s new home. After a brush with scandal threatens to tarnish her family’s social standing, Mariah is sent away by her father. Fortunately her aunt, Mrs. Francesca Prin-Hallsey, offers the use of the old gatehouse on her late husband’s estate. But since Mariah also needs a way of supplementing the meager funds provided by her family, she begins writing novels. Inspiration for her literary efforts is the one thing not in short supply, especially once Captain Matthew Bryant arrives to lease the estate after her aunt’s death. Both kind-hearted and courageous, Matthew is the stuff from which romantic heroes are made, and he would be perfect for Mariah if only he wasn’t so determined to marry another woman! Klassen creates a wonderful cast of engaging characters while neatly stirring in a generous dash of mystery and danger into the plot of her latest, charmingly romantic inspirational romance." Winner of the 2011 Christy award for historical romance!