Everypony enjoys myths and ponytales, even if they know such things aren't real. Alicorns fighting against a spirit of chaos? A princess trapped in a library under a tree, waiting to be found? Quite enchanting and fantastic tales yes, but nonetheless as fictional as Daring Do and other such stories. At least, that's what Rarity used to think.
This is the best story i've ever read. It's such an emotional rollercoaster in the second half and I cried out of happiness when I reached the end. I would gladly buy a physical copy if it existed and can't wait for the sequel to be finished.