The book, “Castro’s Secrets: The CIA and Cuba’s Intelligence Machine” by Brian Latell, is based on interviews with Cuban spies who defected and on declassified documents from a variety of U.S. agencies, including the CIA, the FBI and the Pentagon.

Latell writes that assassin Lee Harvey Oswald told Cuban intelligence officers he planned to kill Kennedy. “Fidel knew of Oswald’s intentions — and did nothing to deter the act,” the author writes.

Latell, who was the CIA’s national intelligence officer for Latin America, is now a senior research associate at the University of Miami’s Institute for Cuban and Cuban American Studies.