To my faithful student, Twilight Sparkle,

Friends and family are irreplaceable in the end, and though a friendship can be damaged, it’s worth struggling to mend and keep that friendship, if it’s a true friendship anyway. Worse, I’m afraid friendship requires reciprocation and, to our best knowledge, books do not possess enough of an individual personality to participate in friendship.

However if you should locate a book which does I would very kindly request you introduce us as well as the manner by which you were introduced.

I would also like to request that should you have met such a book and it is insisting most heavily against our meeting that we expedite said meeting greatly.

Your loving mentor,
Princess Celestia

PS. Have you ever wondered if a changeling could turn into a book?