As Twilight visits princess Celestia in Canterlot, she discovers a bookshelf with just a dozen parchments with neither bad nor good stories. She speaks about them with the princess and, one thing leading to another, Twilight finishes by publishing her own story.
But this story isn't so much about Twilight than about the world of published writers and the one of amateurs writers. And how the limit between both can be very thin.