This story is a sequel to The Monster in the Twilight

Now that Luna has returned to the throne, and the aftermath of her brief appearance as Nightmare Moon is being cleaned up, the story is over. Right?

Not quite.

Twilight Sparkle had nearly been destroyed in the chaos of Nightmare Moon’s return, but now with the assistance of her five friends, she is facing a fascinating new world filled with wonderful things. No longer the scarred monster who nearly destroyed Canterlot and raged through the Everfree Forest for over a decade, now she has been healed by the Elements of Harmony and is living at the edge of town with her adoptive mother Zecora. Not all the fears of her past can be left behind that easily though, and now she must face the consequences of her actions as she faces the most daunting challenge of her life.

Ponyville.

Letters is a sequel to the alternate universe story The Monster in the Twilight. In this story, Twilight Sparkle exchanges letters with Princess Luna, two ponies with a common problem of fitting in and making friends after the destruction of Nightmare Moon.

Normally I would try to talk you into reading the sequel even if you haven’t read the original story, but in this case, you’ll probably be more confused than entertained. But go ahead. I don’t mind if you don’t read the first story. You’ll never find out what an Urlock is, but that’s fine. It’s your funeral.

Editing Assistance by Alicorn Priest, Peter and Tek

Credit for the incredible picture All Night Study Group goes to Bibliodragon at Deviantart

Physical books are available on Lulu.com (up to Chapter 82)
Letters From a Little Princess Monster (Paperback) 726 pages
Letters From a Little Princess Monster (Massive Hardback) 780 pages

Recently rewritten. Contains occasional adult humor and violence.
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On a request from Princess Celestia, Twilight Sparkle and the rest of the mane six explore an abandoned mansion located deep in the woods. While doing so, they unwittingly stumble across an enchanted mirror that scrambles their DNA and pops out three brand new bouncing baby ponies. Hilarity and drama ensue as the mane six must cope with being suddenly thrust into motherhood, as well as protect their new foals from a dark god that wishes to use them for his own sinister gain.

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Fanart:
The three foals. by Freefraq on Deviantart.

"... at the forefront of our fandom’s writing scene ... Masterpiece." —PCaRG
"... really enjoyable ..." —City of Doors
"...worthy of high praise." —PaulAsaran
"Lots of wonderful world-building, great action, well-developed characters and an engaging story." —Hoopy McGee

Steel Song is a lot of things. Earth pony. Uncle. Professional bodyguard.

Retired.

So when he receives a mysterious package from Princess Luna a few weeks after the changeling invasion, he's understandably apprehensive. More-so when he presents himself before the Royal Diarchs to find that not only do they desire him to come out of retirement, but to take command of a most unusual position...

A position that may have more significance than any of them suspect. Because strange thefts are occurring on the Equestrian Railway, thefts that nopony can explain. Thefts that may have far more sinister intentions than their seemingly innocent nature may convey.

Intentions sinister enough to shift the balance of power in Equestria forever.

Book I of The Dusk Guard Saga.
Epic Fantasy
Has a collection of Side Stories as well, the first of which is here.
Now with a TV Tropes page!
"This is 100% Approved by Twilight's Library!"
Added to Twilight's Library 11/26/2013
Added to Canterlot's Finest 12/01/2013

The past always comes back to haunt the present, there is no escaping the inevitable. For decades, Celestia has kept a secret from her student. A secret she made out of pain, and through pain will be revealed for all to see; for Twilight Sparkle is the secret daughter of the Sun.

Now, there will be consequences.

Consequences, they come in all shapes and sizes for every decision. For every action there is an equal and opposite reaction. These words are lessons that Princess Celestia should know, bits of wisdom she practices in her rule of Equestria. How is it then, that when faced with a decision, she chooses the one that would inevitably bring the most pain? How is it that she couldn’t bear being recognized as the mother of her child? And why? Twilight Sparkle is about to find out.

Disclaimer: (I do not own the picture; Title Picture owned and designed by KitsuneHino; Source: http://mel-rosey.deviantart.com/art/By-my-side-364777307) (I do not own any of the characters, places, events, etc. outlined in this fanfiction, MLP FiM does under Hasbro, give them the credit.)

While Princess Luna is away celebrating Nightmare Night in Ponyville, Celestia tries on a strange black bauble from her sister's jewelry box. The result will be the creation of the most terrifying thing Equestria has ever seen. The Sun herself turns against all the ponies in Canterlot. Can Luna and her Lunar Stallions possibly hope to stop her? And if so, does Luna have the fortitude to strike down her sister in the end?

FEATURED May 16th 2012!

Princess Luna's Lunar Stallions are an elite guard force of seventy, the descendants of the originals from a thousand years ago. Her lover leads them, and they've begun to flourish and be accepted by society. But now there's a new super-power in Canterlot, and she's killing the criminal ponies she catches rather than arresting them. The descendant of Luna's avatar of WAR has emerged. Her ancestor was the one mare to ever go into battle with the Lunar Stallions, the Moon Champion. Can the Lunar Stallions stop this killing machine? Who is she?

Princess Luna falls comatose and is revived by the love-sick kiss of one of Celestia's guards. As a reward, she leads him to the ancient hidden barracks of her long forgotten guardian force. Their slowly blossoming romance gives birth to a breed of royal guard not seen in 1,000 years. The Lunar Stallions!

Mort, also known as the Pale Pony (of Death), has been tasked to take time off from his rigorous duties of reaping souls. Seeking guidance, he is directed towards the town of Ponyville, to learn about the magic of friendship from Twilight Sparkle and her friends. All he needs to do is keep his true nature a secret. That shouldn't be too difficult...right?

Special thanks to Specter-Von-Baren and Pyrite Foolsgold for their help in proofreading and editing this story, as I really needed it. Additional thanks to Pilate, Chuckle5, Unimpressive Vagaries and Admiral Biscuit as well! Couldn't have done it without all their help!

Credit for the title card goes to Siansaar, AKA Carnifex.

For another excellent take on Mort, check out Sip's version!

Discord managed to free himself from his stone prison, but some difficulties occured and gave him a new perspective as a pony. How will he adapt to these changes? And will his plan work this time?

Comments are filled with spoilers.

Each of the chapters of this fic is an independent story featuring one of the Mane Six having an encounter with the supernatural. They are presented as one story because of their common theme. The stories are:

Fluttershy: The Curse of the Night When Angel falls sick, Fluttershy ventures into the Everfree Forest at night to find a remedy. Though she faces danger, she escapes... but not unchanged.
Rarity: Blood and Water You know the story. Rarity gets seduced by a creature of the night, and her friends don't realize what's happening until it's too late. They find the vampire who turned her and destroy him. But then what happens?
Rainbow Dash: The Big Battle Discord's defeat didn't erase every trace of his influence on Equestria. Fortunately, hard-working ponies are already gathering the remnants of his power into Manehattan for easy disposal. What could possibly go wrong?
Pinkie Pie: Gallows Humor Pinkie Pie, Ponyville's premiere prankster, is dead. So why haven't the pranks stopped?
Applejack: One of the Herd Applejack may be in charge of Ponyville's biggest farming community, but that doesn't mean she can't take a break now and then. Besides, tonight's meteor shower should be even better than last night's...
Twilight Sparkle: The Case of Wild Clover the Warder It's a boring day in Canterlot, and Twilight Sparkle has time to kill. Maybe picking up an old lot of books will brighten her mood.

Feedback and error-spotting welcome!