In the president's secret service - Ronald Kessler

Never before has a journalist penetrated the wall of secrecy that surrounds the U.S. Secret Service. After conducting exclusive interviews with more than one hundred current and former Secret Service agents, bestselling author and award-winning reporter Ronald Kessler reveals their secrets for the first time.

George W. Bush's daughters would try to lose their agents.
Based on a psychic's vision that a sniper would assassinate President George H. W. Bush, the Secret Service changed his motorcade route.
To make the press think he came to work early, Jimmy Carter would walk into the Oval Office at 5 a.m., then nod off to sleep.
Lyndon Johnson gave dangerous instructions to his Secret Service agents and -engaged in extensive philandering at the White House.