Well it's not actually a sequel. Here is a collection of short stories and histories detailing the life of Alternia, a changeling queen impersonating the life of Princess Celestia. These are the stories of the ruler under her mask.

Reading the main story: Princess Celestia: The Changeling Queen is a requirement if you don't want to be spoiled or confused. I will try to provide background information when I can.

For readers of the main story, there are basically no spoilers if you've read past chapter 8. Enjoy!

Humans.

Truth or myth? Ancient lost civilization or just an old pony's tale?

No pony has ever seen one, and most haven't even heard of them. But Lyra knows that these wonderful creatures are more than just old legends, and she's going to find out... and possibly drive her roommate insane in the process.

Rainbow Dash asked Twilight Sparkle out on a date. On the first of April.

When one pony plays a prank, and the other lays out their heart for all to see, disaster is bound to follow. A prank is by definition dishonest, but you don't need to lie to pull a prank.

I hate doing descriptions...
Happy April Fool's day! I felt guilty for not doing a Valentines day special so you get a special for a minor holiday instead!

Cover art generously provided by the wonderful Angelic Flight over on DA. Go check her out!

Celestia has always watched over her little sister. When she has to banish her sister to the moon, she works to right some wrongs in Equestria so that her sister will be happier upon return.

However, the biggest change Celestia made has gone completely unnoticed by Luna since her return. Celestia calls Luna into her study to bring Luna's attention to one of the biggest changes of Luna's life.

(Note: romance tag NOT for princest.)

EDIT 3/26/14: In the popular stories box! Thank you all very much! This is my first really popular story, and I couldn't be more grateful for all the positive feedback!
EDIT 3/26/14 (again): Featured! Oh my GOD. This is just too awesome. I'm going to have a celebratory bowl of Lucky Charms and wonder how I came to earn the support of you lovely people.

This story is a sequel to Princess Celestia The Changeling Queen: Stories Behind the Mask

At the Royal Wedding, Chrysalis and the Changelings were revealed to all of Equestria.

But another mask was torn away that day. A mask born for a thousand years. A mask created on one promise. A mask, that has become synonymous, fused, to its bearer.

A mask that when ripped off, causes Twilight, her friends and Luna to question everything they ever knew about the one pony, one very important pony.

At the Royal Wedding, the meaning of the phrase 'Princess Celestia' changes forever.

NOTE: Chrysalis is NOT Celestia!!! That'd be impossible to pull off.

Credits to: Plainoasis for the design of the cover art
Note 2: Original cover art here: https://angelea-phoenix.deviantart.com/art/Contest-entry-Changeling-Celestia-337023552

Pre-read/edited by Zervziel,
Blankscape,
FinalFan,
Courage Fire
Aurora Borealis

Side Stories to this can be found: here.

An audio-reading on youtube up to Chapter 21 is up by StraightToThePoint Studios. I'm aware there are others but this is the nearest complete one: [embed]https://youtu.be/X3eMW673CSY[/embed]

There are also 2 print versions of Princess Celestia:The Changeling Queen. Nonexistent Publications run and Ministry of Image's run.

Contribute to the TV Tropes Page (thanks to Babs_Seed72 for getting it up)

Every week, Cadance and Celestia used to have tea and discuss everything. Now that Cadance has become Princess Mi Amore Cadenza, ruler of the Crystal Empire, those weekly tea sessions have gone away. So Celestia decides to visit the Empire, unannounced. Why?

Because, as Cadance is about to learn, when you are a Princess, making a pot of tea is more than just making a pot of tea...

Set in S4, before the events of Three's a Crowd.

Non-mature FB on 3/22/14. Mature FB on 3/23/14.

Added to Twilight's Library on 3/23/14.

NOTE: Rated E for everyone, but if this was a movie, I'd rate it PG for Adult Situations. These ponies have a serious talk about life and s--t.

Prompt suggested by Skeeter the Lurker. ("Cadance and Celestia have tea.")

Pre-read and edited by Cola Bubble Gum and Sharp Spark.

I don't know who made this amazing picture. If you know who, or are that person, PM me for credit. ARTIST FOUND!

Thanks, Xeadin!

A 'Know your Star' story; only with your favourite ponies getting unneeded hassle and lies told about them. Won't this be fun? Probably not... But hey, everything can't be seriousness all the time, so let's take a load off and just pester some ponies, and Spike for good measure.

The never ending adventures of Know Your Mare march on and on and on.

Comic: http://ladlordblack.deviantart.com/favourites/#/d53s1hc
Animation: Part 1: http://www.youtube.com/watch?v=B_c7CPLlzO8&list=LLAaWYxICqZHBI2hBIxg2oEg&feature=mh_lolz
Part 2: http://www.youtube.com/watch?v=hqYTZ1TKNfk&feature=g-u-u
Picture: http://luna-is-best-pony.deviantart.com/art/Know-Your-Mare-314464512