Though nobody sells books on television better than Oprah, the books that do best usually have titles like ““Super Marital Sex.’’ Even Oprah was caught off guard. ““Over the years we’ve tried to do fiction and always died in the ratings,’’ she told NEWSWEEK. ““If Jacqueline Mitchard sells a million copies, I still need 10 million viewers to win. I’m not doing it for the numbers.’’ A lifelong reader, Oprah says she ““was so moved when I read this story,’’ and saw immediately that it fulfilled her aim to feature books that ““people can feel some sort of emotional attachment to. I always feel if you do right, right will follow.’’ And if that doesn’t sound especially profound, rest assured that to every publisher in America, it sounds like Shakespeare.