In the opening story of Geary Hobson's riveting new collection, Plain of Jars, a young private confides to his friend that he's trying to leave the Marine Corps. "I am not doing this just because I find the Marine Corps too tough," Warren Needham says, but because violence is contradictory to his faith. The story's surprising climax, however, reveals a different side of Needham's contradictory nature. It's this acute understanding of conflict...