Mrs. Kennedy and me
(Book)

"For four years, from the election of John Fitzgerald Kennedy in November 1960 until after the election of Lyndon Johnson in 1964, Clint Hill was the Secret Service agent assigned to guard the glamorous and intensely private Jacqueline Bouvier Kennedy. During those four years, he went from being a reluctant guardian to a fiercely loyal watchdog and, in many ways, her closest friend"