The prolific and controversial biographer Kitty Kelley has written unflattering tell-alls about some of America’s most famous figures — Frank Sinatra, Elizabeth Taylor, Jacqueline Kennedy Onassis and both George Bushes among them. Now she’s taken on a subject who has long been seen as perhaps the most untouchable of all: Oprah Winfrey. The book doesn’t contain any explosive revelations, but it does flesh out some details about things Winfrey has discussed: the sexual abuse she says she endured as a child, a traumatic adolescent pregnancy, a heavy flirtation with drugs and the nature of her relationship with best friend Gayle King.