What is the author's style in The Broker by John Grisham?

The language of this novel begins with a simple English that is filled with the slang common to this type of novel filled with political and secretive themes. The language changes somewhat as the main character, Joel Backman, travels to Italy and begins attempting to learn the language quickly. Joel is placed in a situation where he has only a few months to become fluent in Italian. Due to this, Italian begins appearing in the narrative, with translation for the reader.