Aryanne, Ponyville's resident Nazi sympathizer, unicorn supremacist, and self-hating earth pony, gets asked to be the substitute teacher for Ms. Cheerilee's class when the latter pony falls ill one morning. During a lecture about the finer points of eugenics, Ayranne discovers that the ponies of Ponyville aren't quite as excited about the Final Solution as she is.

As with most of my stories, you have the Seattle's Angels skype group to thank for this one.

The Elements of Harmony are defeated and Nightmare Moon stands on Equestria's throne as their new Queen. Is Equestria doomed to suffer through night time eternal or will they be... perfectly fine? Twilight finds her new job as slave or "personal assistant" to her new ruler to be a bit maddening. But is this evil sarcastic queen really as bad as she originally believed? And just how many others are diabolical enough to cash in on the change in staff? Can Nightmare truly run a peaceful Equestria? Let me just answer all these questions right here in the description...

Twilight’s flying lessons have taken to a slow pace, but things quickly heat up when she gets her very first wingboner... right in front of Rainbow Dash.

Could her best friend be responsible for this?

Youtube reading by Doom Pie Network

Twilight Sparkle, Princess Celestia's most prized and faithful student, is being sent to Ponyville to learn about the magic of friendship.

This is going to be fun!

A spinoff of Letters From A Disgruntled Friendship Student by milesprower06.

Twilight never cared much for romance, but after falling for Rainbow Dash, she's ready to make her move. But what happens if those feelings are unrequited? Should she hold onto hope? Is it even possible to let go and move on?

I've read a bunch of shipfics that are all happy resolutions after the confession so I wanted to try an alternative. So here is a slightly darker TwiDash fic because I am a terrible person who must make ponies suffer. Oh God Why?!

Edit: Now with addition of new cover pic used with permissions from aeroytechyon_x
Reformatted with less walls of texts and less Lavender Unicorn Syndrome as of 03/20/2015

Sequel here.

The real Nightmare Moon has returned during Nightmare Night, and she plans to get revenge on Twilight Sparkle. However, she hasn't been aware of any events past her demise. Or the secret feelings a certain mare has that she's hated for over two years.

On the night of her return from exile Nightmare Moon comes across resistance as she had expected. However she had a backup plan on hoof for just such a predicament, tearing off a small fraction of her soul and attaching it to the bearer of the element of magic. Now she must play the long game to ensure that she can obtain the loyalty of her new host and once more rise to power over Equestria.

Cover art thanks to Tonto the trotter.

Rainbow Dash finally finds the courage to confess her love to Twilight. Unfortunately, Twilight does not feel the same way. But Rainbow Dash refuses to give up. She figures, rather than trying to steal Twilight's heart with romance and flowers, she'll take a different approach. One that is much more forward than the usual.

Note - this fic will have some sexual themes. There will be pervy Dash.

This story is a sequel to The Celestia Code

When the monsters created by the dark crystal engine escape their prison, it's up to Princess Twilight Sparkle to deal with them. She gets help and advice from Princess Luna, but things don't go as planned. In fact, when a pony who relies on logic and rationality tries to navigate the stormy seas of emotional entanglement while simultaneously saving Equestria from a horde of evil creatures intent on destroying everything they encounter, nothing goes as planned.
AUDIOBOOK by VisualPony
WARNING: Major spoilers in the comments.

Book 2 of the Alicorn Adventure series.

Goodreads Page
100% Approved by Twilight's Library!

The Badass Twilight tag applies more than ever, but please note the new tags.

This story is a fairly direct continuation of The Celestia Code. You might be able to follow it without having read The Celestia Code first, but it's better if you do.

The sequel is here: The Twilight Enigma

Most excellent pre-reading/editing done by the erudite AcademicPony and the dapper statoose!

Niamh, an introverted student of veterinary science, finds herself transported to a strange world inhabited by ponies. Of course, that means becoming one herself. Now she must prove to the other ponies that she is not the 'Nightmare Moon' they think she is, and earn their trust, while they must earn hers. Especially this 'Princess Luna' character.

But two questions stand out above the rest as being truly important: How did she get there, and why?

Featured 19/03/14 Didn't expect that.

Amazing cover art was done by the extremely talented MrFulp.