In a mere one thousand days, Jacqueline Bouvier Kennedy created an entrancing public persona that has remained intact for more than a half-century. Even now, long after her death in 1994, she remains a figure of enduring--and endearing--interest. Yet, while innumerable books have focused on the legends and gossip surrounding this charismatic figure, Barbara Perry's is the first to focus largely on Kennedys' White House years, portraying a First Lady...