Twilight has gotten sucked into a book. She is flung into a world populated by her friends, but they don't seem to know her. Twilight must find a way to get back to Ponyville. What a letter to Celestia this would've

Twilight must release each of her friends from eternal torment and set her self free in the process. She has regrets, and so do they, but is it possible to release them? CAn things ever go back to the way they were?