What is the author's style in The Sicilian by Mario Puzo?

The language and the meaning of the writing of the novel are such that the novel is quick reading. Most of the prose is in simple everyday English with no hidden meanings. The terms that are Sicilian are explained by the author when they appear so the reader is never left wondering what a particular term means. Puzo explains not only the meaning of the term bu how it is used and more often what the history is, like the term omerta.