This isn't where I belong. I left all this behind years ago, moved on with my life. But a mare from my past brought me back, and now she won't let me go. So I'm stuck here, trying to make the best of it with ponies that don't understand me, don't even like me. But when something moves in the darkness, and when things go wrong in the cold, dead night, they'll turn to me to try to set things right.

Why? Because once a police pony, always a police pony.
~~
This is a spin-off story to 'Why am I Pinkie Pie?!', and will contain spoilers for that story, but it's not necessary to read that story to understand this one.
Cover art by the talented Conicer
Need more Cinnamon Swirl? Merlos the Mad wrote a fanfic of this story!

There is now a side-story: A Hard Day's Nightmare Night

While on a rescue mission, Twilight lands herself in a dead end from which none of her magic seems to help her out. All on her own, she has to face the prospect of perishing.

Cover Art by Ventious

When a crash reveals how badly Rainbow Dash has been neglecting proper hoof care, her friends insist she get a hooficure. It's for her own good, after all! But why does the prospect seem to bother her so much? A concerned Fluttershy tries to help... and uncovers a painful secret she never suspected.

Rainbow has always kept her friends at foreleg's length -- can the two ponies' relationship survive such close contact?

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)

A snapshot of the millennial lives of a young Celestia and Luna, as they prepare to do battle with Discord and fight to keep the Harmony they have only so recently mastered, and learn lessons they will struggle with all their days. In a journey that has no end, what matters most is who walks beside you.

Twilight has something she needs to tell Princess Celestia--something that means a chance at getting everything she's ever wanted, or of losing everything she's ever had.

Something so terrifying that the only way she could say it was in a letter...and so wonderful that she had the courage to send it.

(Thanks to Cenit V for the cover!)

Okay, I don't know if anyone can hear this, or read this, or whatever, but I'm trying my best to use Pinkie Pie's legendary fourth-wall-breaking powers to try and get a message out.

If you can hear this, I need help. I'm in Equestria, and man, this is strange. But I'm also stuck in Pinkie Pie's body, for some reason.

Yes, it's just as weird as it sounds. And now, I need your help... because all the ponies in this town think I'm crazy!

A day in the life, and a glimpse into the mind, of Ponyville's favorite mail carrier and single mom. But if she had the choice of any one day for everyone to read about, it probably wouldn't be this one...

Right now, I'm in an unfamiliar bed, but even so it feels quite comfortable. I'm relaxed and safe, but I think that's because of the pony laying next to me. It's been over twenty years since I met her, and along with her there are a lot of ponies in the room with me. They're all really nervous and scared. But I'm okay, because she is here.
My name is Twilight Sparkle. I am the Archmage of Equestria, the youngest ever at forty five years old, and right now, I'm laying on my deathbed.
But that's okay.
As long as Luna is here, I'll be okay.

Twilight Sparkle realizes that Rainbow Dash has been keeping a secret from her ever since the Mare Do Well incident. When she goes to confront her about it, she finds out more than she bargained for. And then Twilight reveals that she's been keeping something from her friends ever since the Royal Wedding. Now everything is out there; harsh words have been spoken and a once strong friendship hangs in the balance.