Journalist Diane Dimond, who worked for the syndicated show “Hard Copy,” conducted several interviews with Oprah Winfrey’s ex-boyfriend, Randy Cook, in the 1980s, according to the book. On the show, owned by Paramount Pictures, “there wasn’t anyone we couldn’t cover,” Dimond tells Kelley. “But I found out fast that Oprah Winfrey was definitely the one untouchable when Linda Bell Blue, my producer. . . . got a call from none other than Jonathan Dolgen, head of Paramount, who screamed and yelled until Linda promised to call me off . . . She told me that we could not be seen as attacking one of the most successful black women in America. . . . At that point I had to drop the story.”