Very basically, “Kennedy, Sinatra, and the Mafia” is about the Kennedys turning on Sinatra’s friends in the mob—who were also associates of the president’s father, Joseph Kennedy Sr ...

John F. Kennedy and Frank Sinatra; they were two of the biggest names in 1960s America. The pair met for the first time in the Mafia-ran Sands Hotel, Las Vegas and immediately bonded.

Take, for instance, “Kennedy, Sinatra, and the Mafia,” which combines well-worn assassination theories with folklore that will be familiar to anyone who has seen “The Godfather,” and ends ...

Sinatra and Kennedy. AFP via Getty Images. The L-shaped mid-century modern estate includes four bedrooms and six bathrooms across 6,661 square feet.