One day, just like that, Celestia decides she's going to go mad with power.

Full-cast audiobook by Illya Leonov.

Edited by MrNumbers and Themaskedferret. Winner of FanofMostEverything's Imposing Sovereigns contest!

As seen on EQD and the Royal Canterlot Library.

On a dark night filled with even darker magics, an insane cult attempts to give Nightmare Moon a body and life of her own, utterly separate from Princess Luna. But, when the spell is interrupted by Celestia, something unexpected is created.

Now, a little black alicorn filly named Nyx finds herself living under the care of Twilight Sparkle, only to be haunted by memories and emotions from her past. Is she Nightmare Moon reborn or is she simply a doppelganger with a soul and mind of her own? Can Twilight Sparkle protect Nyx from those who refuse to see past her dragon eyes and black coat?

Or, will Nyx be forced to inherit the sins that may not even be hers and become the greatest evil Equestria has ever known?

[Complete! With TVTropes apparently!]
Also, apparently, an animated trailer.

In a world of brass and steam, Twilight Sparkle had thought she had made a life-changing discovery with the invention of the telescope. For better or worse, she was correct.

Now her discovery has not only changed her life, but the lives of those she seeks out in her desperate attempt to contact the only other creature as lonely as Twilight herself.

It all would have been much simpler, but it had to be the one Twilight could only call The Mare on the Moon.

Decidedly not within walking distance, then.

[Featured on EQD before story was meant to be submitted. 4/03/2015]

[Editing team: Southpaw, Wolfvenom, Maskedferret, SwanSong and BluePaladin42, without whom this story would be a fraction of its current state.]
[Special thanks to Novel-Idea for the updated cover]

A hidden museum rests in the Canterlot palace, by law open to the public, by practice closed to visitors. Within its walls lie treasures of opal and gemstones, salt and wood. Shelves filled with untouched scrolls line the walls.

It is here that Luna pays her respects to Equestria's fallen heroes. Why, then, is it against her sister's wishes?

Pinkie Pie preemptively apologizes to Twilight: she's going to ruin their friendship.

Twilight agrees.

Pinkie suits her better as a girlfriend anyway.

Princess Big Macintosh saves Equestria.

This comes as a surprise to Princess Celestia, who wasn't aware Equestria needed saving, actually.

A less-than-imposing sovereign.

This story is a sequel to Passion and Reason

There comes a point in your life when you finally become aware of the road you're walking down, and where that road takes you. Where you realize the whole way's been mapped out for you in advance, and you never questioned it before. The moment where you first have to ask if you're okay with that.

Spike and Applebloom just want to pull over for a bit and get wasted.

War, Famine, and Pestilence await their last member so the Apocalypse may properly begin. The only problem is he’s tied up in a meeting with his editor. What is he writing? Um. Look! A moose!

Can Pinkie Pie assuage the impatience of the remaining Horsemen of the Apocalypse with cupcakes until their last member finishes his work of Equestrian Literature?

Inspired by Binky Pie which was written by Miyajima of FimFiction.net
(Done! And we all waited so patiently.)

With editing special assistance that does not involve editing by Bad Horse, Maskedferret, Daniel and other unnamed individuals who have not been dismembered by War, or eaten by his horse. Honest.

Special thanks to Zedew at DeviantArt.com for permission to link to his excellent picture, ‘My Little Death Dealer’

We all know the story of how the Princess’ young student and five friends defeated Nightmare Moon and brought Princess Luna back to our lands. But what if the tale were false? What if the young Twilight Sparkle on the event of her entrance exam had not been rescued by Princess Celestia, but instead lost her mind among the power of her youthful surge and had to be sent away, far away before she could destroy all of Canterlot with her newfound power. Now the feral unicorn prowling the Everfree Forest only vaguely remembers her past, slipping away from constant terrifying attempts to capture her.

And she is beginning to remember what true power felt like.

Editors include: Peter, Justin, Featherprop, Mitch H, and Bad Horse
Featured on Equestria Daily
Reviewed by Chris on One Man's Pony Ramblings and by Paul Asaran on his review blog
Now with a TV Tropes page

Physical books are available on Lulu.com
Monster in the Twilight (Paperback) 272 pages
Monster in the Twilight (Hardback)