Who is La Costa Nostra from Running Scared: The Life and Treacherous Times of Las Vegas Casino King Steve Wynn and what is their importance?

La Costa Nostra is the formal name for what we most often refer to as the Mafia. In this book, however, it typically refers to the mob in Chicago. La Costa Nostra has a large presence in Las Vegas, and it was often a silent partner of finance for casino owners.