Love is one feeling that can never be taken from someone's heart. No matter how many years of separation, no matter what wrongs were done in the past, no matter how much enmity exists between two ponies, love will always stand; at least that's what Nightmare Moon is hoping for. 700 years ago was the last time she had seen her sister Celestia, and her departing words had simply been 'I love you'. Now, after so long, Nightmare Moon's heart longs for its other half; and thus, she has brought Celestia back from the far away, magically void lands she cast her to so long ago. Now, she wonders if her sister will ever find it in her heart to forgive her for what she's done, and if their lives together can ever resume as they once had.

Takes place 300 years before when Luna would have returned from her banishment to the moon, and takes place in a universe where Nightmare Moon was never banished in the first place.

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Thanks everyone for getting the story to the feature box! (12/10/16)
This is now my 1st story to have broken 200 likes! Thank you all so much!
SPOILERS IN THE COMMENTS

Twilight has ascended into an alicorn, and with that ascension comes new dangers and threats. What better way to hold back those threats than with a new body guard. But Twilight wasn't expecting her new protector to be a wolf, and neither were her friends.

Starlight did it, she prevented Twilight from hatching Spike and now, as a filly, plans on setting a new destiny for herself. Now she is ready to go to Canterlot and see if she has what it takes to not only get into Celestia's school, but perhaps become her protege.

This story takes off from the alternate ending of "An Unlikely Love: The Tale of Two Friendship Students" and is the beginning of The Glimmerverse.

Before she became Nightmare Moon, Luna fought many adversaries who threatened Equestria. And since her return, new and old enemies have appeared with alarming frequency. But the land had peace for a thousand years while Luna was on the moon, and now the princess questions how such a thing could be possible.

Celestia offers her a completely logical and reasonable explanation.

Now with an audiobook by Illya Leonov.

This story is a sequel to Divine Move

Gods cannot die, so what happened so long ago that ended in the total collapse of Pre-Equestrian civilization?

After many years of unspoken tension mixed with isolated peace, those that remained have received the cryptic message many never wished to see. When such events unfold, Princess Luna recalls a desire she thought she had all but buried and leaves Equestria without a word, only to be followed by the enigmatic and arrogant Sombra.

Now Luna and Sombra – whose ways have remained undecipherable to every princess so far – try to use what knowledge they have to save the world and themselves.

Book Five and Final Book of Sombra's Odyssey. The cover art is fan art drawn by dragonofruin with edits that were done by me. Beware of the numerous unmarked spoilers in the comments! With some help from: NorrisThePony and an anonymous user. The gore and violence tags are for descriptive injuries in the scenes featuring combat, which is only a small portion of the story. The original version was rated Pretty Good in this extremely spoiler-heavy review by PaulAsaran! Contribute to the TVTropes page!

This story is a sequel to How Not To Use Your Royal Prerogative

  In an Equestria where the Sonic Rainboom never happened, Sunset Shimmer is the prized pupil of the Princess of the Sun. As Sunset struggles to make up for her past misdeeds and come to terms with the pony she wants to be, Celestia sends her to find the classic work The Application of Unified Harmony Magic from the Royal Canterlot Archives.
  Right after lunch, some meddling by her friends and meeting somepony with firsthoof experience of the Sunset she used to be.

Featured on Equestria Daily on August 18, 2016!
Appeared in the FimFiction Featured Box!

Cast: Sunset Shimmer, Moon Dancer, Minuette, Twilight Sparkle & Princess Celestia

Stories set in the Wavelengths Timeline in chronological order:

Origins Arc
The Alchemy of Chemistry
Bards of the Badlands
Grading on a Bell Curve
Habits of the Equestrian Phoenix
How Not To Use Your Royal Prerogative

Applications Arc
The Application of Unified Harmony Magics
Princess Celestia: A Brief History
The Cloudsdale Report

Dreamers Arc
Tactics of Snowbound Unicorns
A Study in Chaos Theory
Teahouses of Saddle Arabia
As the Raven Flies

Cover Credits
Cover Design by Amber Spark
Sunset Shimmer Vector by TigerBeetle
Pony SciTwi Vector by Osipush
Canterlot Bookshelves Vector by FavoriteArtMan
Sunset Shimmer Cutie Mark by MillennialDan

Beta Reader Credits
Ebon Quill - Worldbuilding Writer on The Manehattan Project
Quantum State - Technical Director of The Manehattan Project
The Albinocorn - Master of Sunset Shimmer Stories

Strongly Recommended Stories:
The Brightest and the Best by Pineta - The events in this story are considered to be completely canon to this timeline and explain Twilight's entrance exam to Celestia's School for Gifted Unicorns. I cannot recommend this story enough.
MLP Annual 2013 - "The Fall of Sunset Shimmer" - As above, the 8-page short comic in the beginning of the Annual is also considered to be canon, though with some major variations.

Version 3.0 Edit: Extensive grammatical and mechanics changes. Adjustment to timeline of Sunset's second mirror experience.

This story is a sequel to The Cloudsdale Report

  Twilight’s got her nose stuck in a book. Sunset wants to go see the rest of their friends.

  Things snowball from there.

Highlighted in FimFiction's Feature Box from December 19 to December 22, 2016!
Featured on Equestria Daily on Christmas Eve of 2016!

Historian’s Note: Set in the Wavelengths Timeline where the Sonic Rainboom never happened, Tactics of Snowbound Unicorns is a stand-alone tale that occurs about six weeks after the events in the Applications Trilogy.

Cast: Sunset Shimmer, Twilight Sparkle, Princess Celestia, Moon Dancer, Minuette, Cheerilee, Coco Pommel & Coloratura
Co-Starring: Raven & Philomena

Stories set in the Wavelengths Timeline in chronological order:

Origins Arc
The Alchemy of Chemistry
Bards of the Badlands
Grading on a Bell Curve
Habits of the Equestrian Phoenix
How Not To Use Your Royal Prerogative

Applications Arc
The Application of Unified Harmony Magics
Princess Celestia: A Brief History
The Cloudsdale Report

Dreamers Arc
Tactics of Snowbound Unicorns
A Study in Chaos Theory
Teahouses of Saddle Arabia
As the Raven Flies

Cover Design by Amber Spark
Dark Snow Background by Grim-S-Morrison
Christmas Sunset Shimmer by MoHawgo
Double Diamond Cutie Mark by Pixelkitties
Sunset Shimmer Cutie Mark By Millennial Dan
Text, coloring, snowballs and snowball magic aura effects by Amber Spark

Beta Reader & Editor Credits
Ebon Quill - Quest Designer & Worldbuilding Writer on The Manehattan Project
Little Tinker - Master of Systems at Poniverse & Scripting Engineer on The Manehattan Project
Beltorn - Commenter-at-Large on FimFiction
Painted Heart

Special Thanks:
Quill Scratch & Beltorn - For a last-minute tweaks to the synopsis!

Word Count: 3,800 words
Version: 3.5

Twilight Sparkle, personal student of Princess Celestia, is sent by her teacher to retrieve a very specific book from the Royal Library. The only problem is, she doesn't know what it's called or where to find it.

Fortunately for her, libraries are the most orderly, most mundane and certainly the safest of places one could possibly be. Or, so she thinks.

Twilight is about to find out how very strange the world of books can truly be.

A/N:
This story takes place before season 1. Many thanks to Coandco and Ekevoo for editing and pre-reading.
Cover image: Old Book Bindings

This story is a sequel to Project: Sunflower

After the events of Project: Sunflower, Erin Olsen has returned to Ponyville, happy to pursue her studies in magic. After everything that happened the year before, she's looking forward to spending her days studying and having fun with her friends.

Meanwhile, on the newly discovered world of Harmony, humans and ponies work together to study this strange new world. However, their arrival causes something ancient to begin stirring. Something that may end up changing everything.

Erin will need all of her courage, all of her cleverness and, of course, all of her friends to see herself through what happens next.

Cover art by Valkyrie-Girl
Editing provided by:
Brilliant Point, Coandco, Ekevoo, Ludicrous Lycan, Merlos the Mad and Razalon the Lizardman.

A legendary story comes to life, much to the shock of Applejack and Twilight Sparkle. Will their friendship, and Ponyville itself, survive this ordeal?

An entry for the February Write-off competition.