Sam "Mooney" Giancana started as a hitman for Al Capone. Violent and ambitious, he clawed his way to the top of the Mafia hierarchy. In Hollywood he "did business" with major stars such as Marilyn Monroe, with the CIA, Cuba, the Vatican, Ferdinand Marcos and the Shah of Iran. And when Joseph Kennedy gave him the chance to use mob muscle to get his son John elected, he jumped at it; JFK would be in the White House and Giancana would be the power behind the throne. But then the Kennedys double-crossed him, and with crusading zeal they went after the Mafia. So Giancana went after the Kennedys - and, Giancana's brother and son claim in this book, altered the course of American history. The book offers evidence of Giancana's involvement in the deaths of both Kennedy and Monroe, and of the partnership between the Federal government and organized crime.