This story is a sequel to CoH (Book One) : Of Magic and Masquerades

After the chaotic debacle in the Crystal Empire, and a week's respite, Twilight secrets Sombra away to his new home in the Everfree Forest. The Castle of the Two Sisters is vacant, decrepit, dark. It's the perfect place to hide the former tyrant.

While she plans to continue her tutelage under her new friend, however, a metaphorical wrench is thrown into said plans when Ponyville makes a new and sudden addition to its town guard.

CURRENTLY GOING THROUGHT A REWRITE

Sunset Shimmer, the prized student of Princess Celestia, is sent to Ponyville to prepare the Summer Sun Celebration. Unknowingly to her, her actual mission is to stop Nightmare Moon. However, she was never meant to be the Element of Magic.

With Celestia gone, Equestria is left unprotected against the mad alicorn. Twilight Sparkle, the faithful student of Princess Celestia, is determined to avenge her master and save the kingdom.

IMPORTANT: While this story was being written, some things in canon changed. That means a few things here are going to conflict with canon. Please bear with me on this.

For example, here Maud is the older sister, with Limestone and Marble being middle twins, and Pinkie being the youngest. Also, the friends Twilight had in Canterlot are not the same ponies that live/visit Ponyville frequently. Because silly canon is silly.

After the slumber party at Rarity's, the humane 5 are shocked to discover that the pictures that were taken during the slumber party have been posted on Anon-A-Miss's page for the whole school to see. pictures that were taken using Sunset's phone.

Naturally the girls assumed that Sunset was Anon-A-Miss and when she didn't show up at School it further proved her guilt. But when they visited her apartment using the spare key Sunset gave Rainbow Dash in case of an emergency, they discover a very ill Sunset resting on her bed.

Pushing their anger aside to aid their sick friend the girls soon discover that Sunset is not Anon-A-Miss as whoever it is made a post while they were watching Sunset.

Now as they figure out who Anon-A-Miss could be, Sunset's fever continues to get worse and when her body starts flashing red, they realize that whatever Sunset has is beyond their world's ability to treat.

Canterlot lies steeped in chaos, a virulent and deadly plague still boiling away after a decade of suffering. The city, and the ponies in it, still feel the effects, still feel the bite of the times. The lower city, cursed as it is, is mostly partitioned off, leaving each and every pony left stranded and without help. Ponies struggle day by day just to stay alive.

Even as the ponies suffer, politicians toil away, plotting and scheming, machinations rumbling just below the surface. The city is fevered, sick and bloated, ready to pop at any moment. A single pony may be enough to make it all erupt.

And make it erupt Twilight Sparkle shall.

One small step, one lucky break is all she needs to turn the city on its head and take her rightful place by the Queen's side. But even she may not be prepared for the shark tank that is Luna's court.

How would things be different if Twilight had never made it to Ponyville? Twilight Sparkle finds out just how different things could be when she is forced to travel to her own past while chasing down a mystery; a plot to erase Princess Twilight Sparkle from history.

Landing in a time just weeks after the one thousandth Summer Sun Celebration, she finds a world shrouded in an eternal night, where the Elements of Harmony were never recovered. Can she fix the things that should have, but didn't happen? Or is this Equestria destined to head down a different path?

Chinese Translation by Hell Organist

This story is a sequel to Monsters

You might think that Equestrian nights are but serene exhibitions of Luna's work on the sky. You may believe that you can just lay out on the grass and admire the beautiful stars as a warm evening breeze caresses your mane. And you would be wrong.

Equestria is a magical place, and where there is magic, there is chaos. Dead rising from their graves, inanimate objects coming to life, strange apparitions making your foal cry in her room... sounds familiar? No? Then I'm doing my job right.

I'm Twilight Sparkle, and I work the Night Shift.

This follows canon up to the end of season 2.
Check out the Fanart Repository for lots of awesome Night Shift art!

Featured on Equestria Daily.
Winner of Stories Back from the Read 2013.
One hundred percent approved by Twilight's Library!
Special thanks to Nonagon and Wise Cracker.

Talks broke down. The unification failed. Hearth's Warming have never occurred. The Great Pony War divided the land, and fears of a prophecy forced the unicorns deep underground and into near extinction.

Almost one thousand years have passed. The curious unicorn Sparkle yearns to breach the surface to discover its many wonders and to search for her missing father and brother, both of whom crossed over many years ago. She is forbidden to leave the safety of her subterranean village of Unicornia until she discovers an orange earth pony washed up on the shores of an underground river. That pony bears one of the six Elements fabled to change the world.

Or destroy it.

Cover art credit goes to ouyrof.

Re:Harmony was conceived before Season 4 aired, so some personalities and character relations do not line up with the show's canon.

Also, please refrain from revealing spoilers in the comments. Thanks!

This story is a sequel to Dusk's Dangerous Game

Twilight Sparkle, known to all but the three Goddesses as Lady Everstar, the Evening Sage, has ruled over her kingdom for nearly five centuries with all the wisdom and grace of which she is capable. Her lands are wild and exciting, the prospects good for those with brilliant minds and daring hearts. But now something has changed in the Evening Kingdom, something has changed the balance of power so profoundly that even Twilight herself cannot tell how events may unfold.

Across the ocean, an ancient evil is stirring, its dark hunger can finally be realized. Its servants are many, brutal, and cunning. They are found among the lowest of lows, and the highest of highs. With the balance of power so disrupted, it is at last time for their shadowy plans to come to fruition, to cast off the darkness and strike against the night.

It will take the power of goddesses, magic both familiar and ancient, and the most unlikely of heroes to save not only the Evening Kingdom, not only Equestria, but the entirety of Creation as we know it.

Sequel to Lines and Webs and Dusk's Dangerous Game. Knowledge of the previous stories is not needed, but reading them is, of course, encouraged.

Followed by Courts of The Magi.

Princess Luna knows a thing or two about nightmares and dream magic. Her duties at Night Court have become tedious. With the help of some forbidden power she reaches out to a certain Element of Magic for the companionship and knowledge of modern Equestria she desires. But while Luna is distracted and Celestia sleeps, an old evil returns with plans both dire and terrible and a new evil plots under their noses.
(Story takes places roughly between season 2 and season 3, so post-changlings, pre-Sombra)

Cover image by JJ at lovetomorrowlove.tumblr

At what should have been a routine doctor's visit, Applejack learns that she can never bear foals of her own. After an emotional breakdown, her friends do their best to calm her.

However, as the discussion develops, nopony is prepared for Twilight's revelation: the grand event which brought them together has left a hidden scar within each of them.

Tempers flare, relationships are strained, and the strength of their friendship is tested as each must come to terms with her newfound sterility.

Now on Equestria Daily
and Twilight's Library

Thanks to these wonderful people for all their help

Cover artist
MuffinExplosion

Editors:
NotMurphy
Georg
Ping111
ocalhoun

Prereadering and suggestions from:
Eakin
Distaff Pope
John Perry
Cartsbeforehorses
JaketheArmyGuy