If some of history's greatest artists could go back in time and redo their work, would they? Screenwriter Karen Hall has spent the last 20 years agonizing over her masterpiece novel, “Dark Debts,” first published in 1996. It’s the story of the devil tormenting a Georgia family and it was an instant success when it came out. Instead of releasing another novel, she returned to the story with some major plot changes, including a new ending. We talk with Hall about the story that wouldn’t let her go.