NEWBURG, Pa. -- Rachel Esh, owner of an Amish dry-goods store here, was giddy as customers kept arriving. Cars spilled out of the dirt parking lot onto the hay and potato fields, crushing a few of her neighbor's potatoes.

She ushered the crowd of 40 people swarming in front of her cash register into a line that snaked out the door of Rachel's Country Store. The cause of the commotion: novelist Cindy Woodsmall, who had stopped by to autograph books.

Ms....