For 17 years, Juan Reinaldo Sanchez served as bodyguard to Fidel Castro. But when he became disillusioned with the Cuban dictator’s hypocrisy and tried to retire in 1994, Castro had him thrown in prison. Sanchez made 10 attempts to escape the island, finally making it to the US in 2008. Now he reveals all in his new book, “The Double Life of Fidel Castro.” In this excerpt, Sanchez exposes “El Jefe’s” privileged life. To Cubans, Fidel Castro presents himself as a man of the people, claiming to make only 900 pesos a month (about $38) and owning no property other...