Twilight always thought that being able to send the Princess her letters instantaneously through Spike's fire breath was the best thing in the world. Instant correspondence with her mentor and secret crush could never be a bad thing, right? Unfortunately, Twilight has a habit of writing her secrets down on flammable materials. Now her secret's out, so what's a panicky unicorn to do? Panic, obviously!

The autumn is coming, and our favorite bipedal unicorn, Lyra, is preparing for the big event of the season - the Running of the Leaves!

But how is Bon-Bon going to take it? And can Lyra's body take the bipedal cross-country race? Only one way to find out!

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This whole thing was inspired by the cover image, made by thelivingmachine02 on deviantArt.

Distance can drive us apart. It can also bring us closer together.

After all is said and done, and the ponies have gone their separate ways, the only way they have to keep in touch is through letters.

Original Equestria Daily post is here
Russian translation
Chinese translation
Polish translation
Spanish translation

Now with music and audiobook

Twilight Sparkle and her fellow Elements of Harmony have faced down supernatural foes of the highest order, but sometimes the deadliest danger can come from places one would least expect. As Twilight is forced to bear a devastating secret, her efforts to keep the Elements together may well tear them all apart.
The plotline of the thrilling Pony Psychology Series continues with an exploration of deception, despair and Discord.
This series takes place between Season Two and Season Three.
Secrets and Lies shares the Pony Psychology Series TVTropes page.

Rarity and Fluttershy have been friends for years, and every week they go to the spa. But after every trip, Rarity finds herself growing greener with envy over Fluttershy's beauty and grace, if not something more than just envy— and what might happen if she finds out Fluttershy feels the same way about her?
Rated Teen for moments of sensuality, foreplay, and sexual themes. Reader discretion is advised.
Assistance by Karrakaz, Blue_Paladin42, TheGreatEater, Setokaiva, Squinty Mudmane, Aurora, Starfall, and Ariamaki.
Cover Image by Megasweet, used with permission.
Image colored by Explosivegent.
Additional graphical design by Novel-Idea.
TV Tropes page can be found here, credited to Winter Lily.

For most foals, a magical surge results in a couple hours of frantic searching. For Twilight Sparkle, a magical surge vaporised an entire Canterlot block and killed hundreds. Having spent the last ten years as a fugitive running from the law, she is tired of her life and all she desires is for the nightmare to end. With one last night before she turns herself in, she spends it with her one and only friend - Trixie.

Proof-read and editted by Sabre and Some Person (Thanks!)

Lyra knows the truth. Lyra knows that a shadowy conspiracy dating back to the very dawn of Equestria is responsible for manipulating every major event for the past two thousand years. And Lyra does not care how many museums she has to destroy or how many transdimensional rifts she has to open in her quest to inform the public.

Now with cover image by Madmax! http://img215.imageshack.us/img215/3595/theyaretheworst.png
Spanish translation: https://www.deviantart.com/spaniard-kiwi/art/No-servir-a-estos-ponis-999961442

Audiobook: https://youtu.be/W8W0xxVHtmI

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.

Rarity's decided to break up with Applejack, but were they even an item in the first place? And, perhaps more importantly, what does Applejack have to say about it?

Hijinks, of course, will ensue.

A short trip to Canterlot with Rainbow Dash and Applejack is the perfect opportunity for Twilight to test out her new long-distance Teleportation spell. But a nasty cold dashes the hopes of a quick trip, and makes the spell disappear in smoke: instead of arriving in Canterlot, the three find themselves in the nearby Everfree Forest, and discover that their location is not the only thing that went wrong.

While Rainbow has exchanged her wings and tail for a straw blond tail, Applejack has acquired a rainbow tail as well as a pair of strong, blue wings.

While Twilight attempts to find a spell to return the body parts to their rightful owners, the others must attempt to deal with this situation... and with their changing feelings.