What is the author's style in The Comedians by Graham Greene?

Greene shows the characters that he met when traveling to Haiti in a story that he invented. Due to his Catholic upbringing many of his novels include remarks that reflect his personal attitude towards this and other religions. It is through travel to Haiti that Greene became acquainted with its charm as equally as with people with whom he shared experiences. It is through opening up to such experiences that the adventurous spirit of Mr Brown is conveyed. He writes in a way that is more functional than literary. His realism and simplicity seem to be good tools in keeping the reader's attention. Visual sensitivity and descriptive imagery inspired many filmmakers.