Mattie Yoder's grandfather has been murdered, run off the road in his Amish buggy, and his skull bashed in. Who murdered him? Was it his youngest son who's a sexual deviant, the former businessman who hates the Amish, or a rouge Amishman from Pennsylvania who says he nearly always gets what he wants?Mattie, an excommunicated member of the Amish community in Ohio and now a Ph.D. student in physics at Ohio State University, asks Jed Fredericks, a teacher...