What is the author's style in A Ring of Endless Light by Madeleine L'Engle?

The language of this novel is relaxed, yet it never speaks down to the reader. It's filled with references to classic novels and highlights quotes and poetry pertinent to the story. Those who love literature will embrace the language, while those who don't have the passion for literature might find themselves intrigued, wanting to delve into older tomes. Heavy scientific concepts are written down in layman's terms so the reader is never lost, and difficult vocabulary occurs frequently, but within context so the meanings are easy to grasp, expanding the reader's vocabulary.