The fourth wall is what stands between the audience and the story. The fourth wall is itself the narrator in most books, and it often comments on the story before it. The narrator mediates the world of the story to us, but it does not speak to us.
Except when it does. In “The Tale of Despereaux ,” the fourth wall is as friendly to the audience as it is to the characters in the story. To read “The Tale of Despereaux ” is not just to get the joy of a delightful story, to watch the rise of an underdog, the rescue of a princess, the creation of a perfect villain. To read “The Tale of Despereaux ” is to make a friend. The narrator is telling you the story, and the narrator is kind to you. The narrator is your friend, and thus the story is more real and true.