Little Bit of Charm, New Beginnings Series by Mary Ellis and published by Harvest House Publishers.
After the death of her parents and then watching both of her older sisters find happiness in homes of their own with husbands who adore them, Rachel King yearns for a new beginning. Her cousin Sarah lives near a thoroughbred stable in Kentucky, and working around beautiful horses is Rachel's dream come true. She leaves Lancaster County to find a job at Twelve Elms Stables and believes God has answered her prayers.
And then she meets Jake, an attractive and charming Englisch man. At first she refuses to go out with him, but he eventually convinces her to give him a chance. When Amish men who also wish to date Rachel start encountering strange mishaps, she wonders if Jake is really who he seems to be. What does a young woman do when her heart is pulled in two directions?