After defeating the Siren's, Sunset Shimmer start's using her magical book to write to Princess Twilight about her own finding's on the magic of friendship, and her progress trying to turn over a new leaf in the human world.
Also a Youtube user named RarityFanGirl31 VA has now started doing weekly Dramatic Readings of my stories. The link is here https://www.youtube.com/playlist?list=PLxGPvrdm-opWsXEWXyMjB-DqxpineC66A