A young filly in present day Ponyville is cursed with nightmares of post-apocalyptic Equestria. She finds herself influencing the course of future history in ways that she cannot understand. She must learn to balance her life at home with her life on the other side of the veil, and fight to preserve her own sanity, and her own innocence.

She discovers that such a task is only possible through the magic of friendship.

My name is Twilight Sprinkle, and my passion is donuts—from the delicate morsels I serve at elegant cocktail parties to the hearty pastries enjoyed by hard-working ponies who get up early. I don’t have friends, I don’t have books, and I sure as the sun don’t have any wings. I don’t care whether you’re here for revenge, for romance, or for a favor. My name is Twilight Sprinkle and I’m not who you think I am, so either buy a donut or get the hay out of my store!

(Edited by the mysterious the masked ferret.)

Daring Do cannot believe her luck when she is asked to help explore the most ancient tomb known to ponykind. But terrible danger awaits her, for beneath the earth rests something beyond equine understanding.

Warning: comments contain ending spoilers.

TVTropes page.
Alternate ending by Duplex Fields.
Archived in the Pony Fiction Vault.
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After the Changeling invasion, Celestia and Luna make the decision to have Twilight investigate the Elements of Harmony and solve the mystery of their power.

A thousand years later, Rainbow Dash awakens in a world she does not recognize. She has no idea how or why she came to be there. She does not know the language, the geography or any of the rules of this new time. She soon finds allies in Star Fall, a scholarly pegasus whose Talent is Magic, and Astrid, Star Fall's Griffin guardian. Together they set out to discover why Dash has been sent to the future, and how she might return to when she belongs.

War threatens the nations, a Nightmare stalks the shadows, and Rainbow Dash's arrival has turned her into a wild card in a deadly game that pits the law on both sides of a broken Equestria against a mysterious criminal figure, Max Cash. Yet the stakes are higher than anyone knows, for in her research Twilight Sparkle discovered a dark secret about the Elements, something that will shake the foundations of the world.

Cover image by SierraEx
Has a TvTropes page

One day, just like that, Celestia decides she's going to go mad with power.

Full-cast audiobook by Illya Leonov.

Edited by MrNumbers and Themaskedferret. Winner of FanofMostEverything's Imposing Sovereigns contest!

As seen on EQD and the Royal Canterlot Library.

Straight from the Canterlot archives, this collection of documents retells the rise and fall of Princess Twilight Sparkle, Enlightened Despot of Equestria, Defender of the Peace, Lawgiver, and Commander of Fort Libris.

Twilight Sparkle is, of course, known to historians as the first usurper to seek to schedule a coup d'etat by appointment. But for other details- such as, "What is the longest recorded time a pony has gone without sleep?", "Is it true what they say about swans?", and, "Why is there an owlbear in the Equestrian Witness Protection Program?"- these documents provide the answers and much, much more.

This is ABSOLUTELY SERIOUS HISTORY from primary sources. If anything makes you think this is silly, ludicrous, or unbelievable, blame Discord.

Written for FanOfMostEverything's Imposing Sovereigns writing contest.

EDIT 3-15-17: Wow, almost instant featured! Was NOT expecting that!

EDIT 4-8-2017: Featured in the Royal Canterlot Library! Thanks!

Part of the Remember Fort Libris print anthology, thanks to our Kickstarter supporters!

Twilight Sparkle, Arcane Mage, knows that there is some truth to the story of Nightmare Moon, but her mentor, Princess Celestia, dismisses the matter in a heartbeat. She sends Twilight to the town of Magiville to oversee preparations for the Summer Sun Celebration, much to Twilight's distaste.
Unbeknownst to her, the darkness is gathering in Mystica. Assassins lurk in the shadows, Undead gather in the forest, werewolves sharpen their claws, and criminals and mercenaries prepare themselves.
To win the coming battle, Twilight will have to rely on her wits, her magic, and the five mages she's been saddled with. No matter how much they annoy her.
Rated teen for violence and language. Humanized, action-y. Based on the first two episodes, with some large changes made.

Twilight knows Starlight Glimmer has been reformed under her guidance. Er, mostly—she’s still a work in progress, but there is no doubt Starlight is improving in her eyes.

However, there’s just one bad habit Twilight noticed that’s been nagging at her ever since she first saw it. But how would she converse about it? Should it be handled delicately? And when would she bring it up?

Today. Today, she would talk about it.

Hi, my name is Ditzy Doo. Many of you know me as the author of the 'Wasteland Survival Guide'. For 200 years I wandered the Equestrian Wasteland, and through those experiences I gained the knowledge that I shared with everypony through the Guide. Now, it's time to tell my side of the story.

It's a perfect day in the life of Twilight Sparkle. Ponyville's chief librarian has everything she wants: her books, her studies, a faithful dragon assistant, and the opportunity to go visit Sugarcube Corner on a beautiful afternoon, hanging out with the best friends that a young unicorn could ever ask for.

And yet, in spite of all this, Twilight has the distinct feeling that something is missing...