What is the author's style in Thank You, Jeeves by P.G. Wodehouse?

The novel is written in an English that can at times become very formal. However, the novel is not difficult to read despite this formality. The novel's dialogue is stiff, reflecting the speech patterns of the characters that populate the novel. The exposition is less formal, but still includes some words and phrases that readers unfamiliar with this type of novel will not recognize and might have difficulty understanding.