Josh Neufeld’s "A.D." intertwines the stories of seven Hurricane Katrina survivors redefining their relationship to their deeply wounded home, New Orleans. Shortly after Katrina struck, Neufeld spent three weeks as a Red Cross volunteer in Biloxi, a Mississippi city also devastated by the storm. “A.D.’’ is the outgrowth of blog entries stemming from his experience. The dialogue is convincingly vernacular; the characterizations ring true; the revisionist history is credible; and the double-page spreads will make you want to take shelter from the storm. It’s due out in mid-August, in time for Katrina’s fourth anniversary.