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.

Amethyst Star used to be Ponyville's top organizer. Everything from balancing the Mayor's schedule, Nightmare Night, and even Winter Wrap-Up were dropped on her desk. When the mess ups and the mistakes started to pile up, however, she was only too happy to pass the torch to the new resident librarian.

But, with Cranky and Matilda's wedding under her belt, she can't help but wonder if she threw in the towel a little too early . . .

Good thing there's a pair of friends, dancing around their feelings for one another, that could use a little matchmaking. Amethyst just might be the perfect mare for the job.

Cover art by the illustrious Rossby Waves.
Edited by Jondor and Melon Hunter.
Preread by auramane, Crystal Wishes, and Carabutt.
By special request, pre-preread by Tchernobog

This story is a sequel to Sour Sweet Sorrow

"It concerns us to know the purposes we seek in life, for then, like archers aiming at a definite mark, we shall be more likely to attain what we want."
– Aristotle

In the aftermath of her suicide attempt, Sour Sweet still has lingering feelings of hopelessness concerning her existence. With her father desperate to patch things up along with her boyfriend and best friends organizing a big surprise, can the archeress find the inspiration to go for the gold in the complicated game of life?

(My fifth featured story! - 6/16/16)

This story is a sequel to Beauty Will Tear Us Apart

There is another secret agent stationed in Ponyville.

Some elder siblings are not as old as they look.

Ponyville's premiere party planner is pondering her purpose.

The world is not quite what it seems. A pony, in the wrong place at the wrong time, just might stumble behind the stage and see the the nuts and bolts that hold their reality together. Some ponies brush up against the dividing curtain briefly and never understand what it is they saw. Some ponies get a good, long look behind it, and their lives are never the same. And some ponies live their whole lives with a hoof on each side.

These are their stories.

The comment section may contain unmarked spoilers.

Cover art by the multi-talented KuroiTsubasaTenshi.

Big thanks to my pre-readers (in roughly chronological order):
cleverpun
Midnight Rambler
Justanotherbrony
KuroiTsubasaTenshi
war877
JapaneseTeeth

Look at this guy who said something about this, one time.
And also this guy.

Vinyl loves living in Ponyville with her girlfriend. It's nice and quiet, and they can both talk with friends without being pestered by crowds of adoring fans.

On their last night together before they head to their concerts in Canterlot and Manehattan, Vinyl comes home to a lovely dinner to celebrate a special night that slipped her mind.

Fortunately, Octavia had no intention of letting Vinyl's birthday go uncelebrated just because they'd be in different cities when it came.

Preread and edited by The Albinocorn, auramane, and Jondor.
Cover art by Ayahana.

In the stars, a hundred years' journey away, the alicorns gather, to mourn, to mate, and to give birth to the new. They call to their sisters across the galaxies, and Celestia hears them.

Meanwhile, Dotted Line wants her to review tax rebate applications.

(2nd place out of 113 in the "No Regrets" write-off. Dotted Line is from "Whom the Princesses Would Destroy" by GhostOfHeraclitus. Picture by Earthsong9405 & AquaGalaxy, found by Georg. Reading by Super Trampoline. Russian translation by Doof Ex Machina.)

This story is a sequel to Sour Sweet Dreams

Since your first date with Sour Sweet, she has been cursing her dad, claiming that he has been completely ignoring her ever since she was diagnosed with her condition. All of that time, you had pretty much written this belief off as one of her delusions. However, after dinner one night, Mr. Sweet suddenly declares that you and he need to talk. What he has to say shocks and enrages you. Even worse, Sour Sweet overhears every bit of it.

Cover art by Kul

(My fourth featured story! - 5/23 and 5/24/16)

Flim has a golden ticket. Princess Twilight and her new wife Applejack desperately require his signature on some very important paperwork. Obviously this is the sort of thing that should be worth quite a lot of bits up front, with the potential for favors at some point in the future. Flim and Flam hold all the cards, and there's no way this could go wrong.

Oh yeah, and there's a foal involved too. Not that that really matters.

Written for the Writeoff Association's prompt "A Matter of Perspective."

Some questions have easy answers. Why Applejack never revealed her feelings for Twilight was a question like that. When she discovers that her reasons were wrong, what she should do next seems like it should be, too. However, some questions are more difficult to answer than they first appear.

Editing by bookplayer, Jake R, and JetstreamGW.

Being an alicorn is wonderful... except when it isn't. There are plenty of things that put a damper on limitless vistas of possibility afforded by such a long life: Court, mortal needs and expectations, the occasional decade of ennui.

And the dreams, of course. Agelessness comes with its own special kind of dreaming. Celestia finds that her own "Inner Court" is a bit too literal, and it--and she--are troubled at the prospect of a near-immortal Twilight Sparkle.

If only she could articulate exactly why that was.

art by spectralunicorn

Part of the Monophysite Quartet, which also includes Celestia Isn't Real, Have You Considered My Servant, Twilight?, and The Esoteric Rites of Darkness. All four stories have a common origin point in an old story idea I called "Monophysite" and touch on who or what Celestia really is in some way. They are otherwise unrelated.