        Twilight says that the books are magical, she thought.  We don’t know if Dale—or his kin—made the books or if he traded for them or stole them.  However, since all the books appear to be relevant to our learning, at the very least, he knows what they are and what they’re for.  If he meant to impress us with a stack of books that he didn’t understand, they wouldn’t be on any particular topic.  And just because we can’t understand some of them doesn’t mean he can’t.