The Love Letters by Beverly Lewis and published by Bethany House.
Though from the Beachy Amish herself, Marlena meets Ellie Bitner, an Old Order Amish mother who offers quilting and needlepoint classes. They soon form a bond, and Marlena is drawn into the circle of Ellie's family. Ellie's handsome cousin seems rather taken with Marlena, but after her recent breakup, she is cautious where her feelings are concerned.
But things begin to change when Ellie's young son Jacob discovers an older homeless man camped out in the nearby abandoned mill. Suffering from some cognitive disorder, the man has few prospects and fewer possessions--among them a small clutch of letters apparently from his own courting days. Could these letters be the key to the old man's identity? And can they bring healing and hope to Marlena and Ellie as well?