What is the author's style in Diamonds Are Forever by Ian Fleming?

The language of this novel is precise English. Much of the exposition is written in proper English with few contractions or slang, expressing Bond's actions and thoughts in the proper language of his home country. The dialogue also has few contractions when Bond speaks. However, when Bond arrives in America, slang and contractions become a part of the dialogue of the people Bond runs into in the course of his investigations. This change of language keeps the feel of the novel real as well as making the dialogue authentic.