By choosing a term used by some country people, she wishes to suggest
her grandfather’s country upbringing
Explanation:
Book learning sounds more like a southern-local accent instead of a proper- US english accent. In this case, it seems like a callback to her grandfather's country upbringing.
There must be something in books, something we can’t imagine, to make a
woman stay in a burning house; there must be something there. You don’t
stay for nothing.
