The book was Twilight Sparkle's greatest creation – ask it any question about how your life might have been and see the answer. It is a work of genius. It is a tempting, insightful, wonderful marvel of magic. It is a terrible mistake.
What if Twilight had been born an earth pony and not a unicorn? No school for gifted unicorns, no burst of magic when she got her cutie mark and, most importantly, no student of Celestia. What fate awaits Equestria?
(Featured on EqD) Starlight Glimmer was always destined for greatness. But when fate isn't all it's cracked up to be, it'll take the help of some friends to change the course she set for herself. But that's not the hard part - it's letting them try.