Everyone knows that Jacqueline Kennedy Onassis was married to two of the twentieth century’s most powerful men: John F. Kennedy and Aristotle Onassis. Lesser known are the five incredible years between those marriages, when she was on her own. Jackie tells that story—the story of a woman who was globally famous, and yet utterly enigmatic.  The world was shocked when Jacqueline Kennedy married Aristotle Onassis in 1968. It would not have been so surprising had the truth of their relationship—which dated back to the 1950s—been known. Jackie knew Ari almost as long as she had known...