Talk:Twilight Sparkle/@comment-9991522-20130802223520/@comment-11159205-20130805112959

The author that book has been informed of the show's developments so she does have some knowledge of the way the show works.

And the author of the book has  been allowed to see some of Season 4 in order for her to rewrite one of her books to help get it to align canonically.

It certainly is not easy to become one though, and before anyone questions Cadence magic ability, the book mentioned that she attended the school of gifted unicorns after she became an alicorn,