What is the author's style in Prince Caspian by C. S. Lewis?

The language in the story will take on many different aspects. There are characters that are considered noble and they will speak, and will be spoken to, in a much more formal way with the use of "sire" and "your majesty" to signify the title and the respect that these characters are given. The main characters in the story, Peter, Lucy, Susan, and Edmund, are the kings and queens of Narnia, but are children as well. There will be a change in their speech through the course of the story. When Peter is dictating the letter to King Miraz challenging him to battle, it is shown that Peter is very formal, but Peter is still a young boy and that is evident at other places in the story.