This story is a sequel to Off The Edge Of The Map

When Twilight is sent with Luna on a diplomatic mission to Draconia, they quickly find themselves somewhere that doesn't appear on any map, and Luna is lost in more than one way...

Thanks to RBDash47 of Pony Fiction Archive for formatting it for submission.
Title image by Valcron

Tremendous thanks to Illya Leonov and Scribbler for the Audiobook version.
Now with a Spanssh translation by SPANIARD KIWI: https://www.deviantart.com/spaniard-kiwi/art/Apoteosis-2-3-857110089

On secret assignment from Princess Celestia herself, Twilight investigates a powerful magical artifact for clues to the mystery of Luna's transformation in the evil Nightmare Moon. Incautious use of the artifact sends Twilight hurtling back in time. Can Twilight discover what caused Luna's transformation? And will she ever make it home again?

Kickass cover art used with permission from Bitz.
http://allthebitz.tumblr.com/

Bon Bon's voice is funny, and that's about all that anypony who meets her notices, as her marefriend Lyra soon steals the spotlight with her explosive personality, strange obsessions, and curious beliefs. And why not? Bon Bon is, after all, a perfectly ordinary, boring pony in every way but two: her voice, and the carefully kept secret that she isn't really a pony.

(Edit:) Now with an annotated version, courtesy of the incomparable Shoggoth Lord!

One beautiful morning, Twilight Sparkle decides she wants a free salad. After a small amount of theft, assault, battery, and arson, she sits down to enjoy what is sure to be the best tasting salad ever.

...Or she would have, if it weren’t for the Equestrian Intelligence Service locking her up as a potential threat to national security. Now, Twilight must escape a maximum security holding facility hidden deep underneath Canterlot. And to do it, she’ll need a paperclip, a spymare catsuit, an escape plan, and an alliance with the dastardly Drakbog, King of Frogs.

After the student body of Canterlot High is swayed by yet another surprise musical number during lunch, Sunset Shimmer muses the students are easily influenced by songs at this time. Pinkie quickly comes up with a song of her own.

Sunset Shimmer considers this a high point of her week.

Being a princess is stressful, but your peers and friends can certainly help.

That was what Twilight had in mind when she invited Luna over for tea one afternoon. A relaxing, friendly meeting between two fellow princesses where they can commiserate and share their experiences. An invitation to a stronger friendship than they had before, offered to a pony displaced in time.

What she got was an uncomfortable assertion about her relationship with her number one assistant, Spike. One that she is having difficulty refuting.

If the sirens had their way, they would have divided and conquered all of Equestria. But a certain Star Swirl the Bearded wasn't having it. Rumor has it he found a way to banish them to another world – one where he believed their magic power would be lost. That world must have been the one where my Canterlot High friends live.

But Star Swirl must have sent them there ages ago. How come they're just surfacin' now?

A cursory look at the sirens' thousand years of history in the human world before the events of Rainbow Rocks. With apologies to Kim Stanley Robinson.

Absolutely no connection to Death and the Dazzlings.

In the wake of the Canterlot Wedding, Fluttershy has to ask Twilight a very difficult question.

Now available in spanish! Spinoff stories can be found in Would It Matter If I Made This Group?

Now with a TVTropes page.

The legends told of their return.

For over a decade Equestria has been beset by the dragons. Every year more villages vanish in flames, and the lonely cities stand as our last redoubt. Winter has gripped the world, and our hope is fading.

But the legends tell of another, a light in the darkness. The Dragonborn, a mythic warrior reborn with the power of the Voice, the only one who can stand against the dragons.

But when she appeared, she was not what we were expecting...