Flowers of Nowhere

A young Amish woman named Mary agrees to marry a gravely wounded Civil War soldier calling himself Abraham Miller. They have a wedding before he dies, thereby giving Mary the rights to his land and giving Abraham the peace of knowing someone will care for his younger brother after he's gone--a convenience for both of them.
After the war, Mary fulfills her side of the bargain--until the real Abraham Miller shows up, injured but definitely alive, and he wastes no time in challenging Mary's story.