The Doyle, Carbone, and Roth families immigrate to the United States from Europe for a variety of reasons: the 1850 potato famine in Ireland, religious freedom, and persecution of the mafia in Sicily by Mussolini in 1925. It is the appearance of Oscar Klein, an orphan from Philadelphia, which brings them all together in the post-depression, pre-World War II era of the late 1930s to 1940s. Oscar Klein is a kid of the streets without formal education,...