When we think of Southern Gothic, a lot of names come to mind: Flannery O’Connor, William Faulkner, Cormac McCarthy. Critics include North Carolina-based author David Joy in that category. His new novel, " The Weight of this World ," takes us into a gritty, seamy world in rural Appalachia. Characters are tormented by their own demons, roused by painful memories of a small town and memories of war. We talked with David Joy ahead of his book talk in Atlanta on Monday night. David Joy is speaking