The Joining.

Adagio had heard the ritual’s name spoken in hushed tones ever since she was a little girl, but what did it mean, exactly? Now that she’s come of age, she’s about to find out.

But knowledge begets more knowledge, and not all truths are comforting. In the swirling coastal fog, pathways aren’t always clear, and sometimes it’s hard to tell friend from foe…

Edited by PresentPerfect

Additional pre-reading help from Dragonas77, Seether00, and djthomp

Cover art created by 2135D

It's been two and a half years since Twilight Sparkle returned from the other world, leaving Sunset Shimmer in the company of the alternate group of friends she made. However, not all has gone well for her one-time rival in the other world. On the night of the 30th moon, Sunset emerges from the mirror and uses an ancient relic to switch their bodies. Alone in the care of Sunset's overbearing ex-tutor, Twilight uncovers the forgotten past that drove her rival to such desperation, while back in Ponyville, Sunset struggles with Twilight's lifestyle clashing with her own dreams.

Proofreaders: RTStephens, Winter Solstice, The Albinocorn, Dartrunner and NightWolf289.
Cover art: FallingRain22

Featured by Twilight's Library September 2014.
Featured on Equestria Daily

Sunset has had the same jacket ever since she came to Canterlot High. Rarity and the girls want to treat her to some new clothes, but some things are too important to be replaced.

Princess Twilight Sparkle lay there in anguished silence for almost a minute until she decided to let Scootaloo, Apple Bloom, and me help her. It came out as a whisper: "My special talent isn't magic." Of all the ponies we might help, I had never imagined our first might be Twilight, or that it would essential for Equestria that we got it right.

Featured (as high as #2) from Oct 18th through Oct 22nd 2015 for 100 hours.
Thank you everypony!

Sunset Shimmer decides it’s finally time to return to Equestria to confront Princess Celestia and ask some tough questions about the treatment of Her protégés. She isn’t ready for the answers she receives.

Celestia sends Twilight her last, greatest assignment. The lost masterpiece of Star Swirl the Bearded!

The spell that the greatest mage of all time couldn't figure out.

The spell given to her by the mare who thought releasing Discord was a good idea.

The spell that, upon closer inspection, seems about as stable as Rarity's emotional state and as safe as Rainbow Dash's usual workout.

... Maybe Twilight should double check with the princess first.

Winner of the Rage Reviews F*CK THIS PROMPT 6 contest. Prompt: "Equestria is getting a new Alicorn Princess."

Twilight has been to the human world and met her counterpart there. Something about the encounter is bothering her, though. More specifically, something about the other Twilight.

With the help of her friends, Twilight does a bit of soul-searching and arrives at a conclusion that she may not like.

(Possible Friendship Games spoilers)

Rarity and Rainbow Dash are a bit of a bombastic couple, and it hasn't escaped Fluttershy's notice. Concerned for her two friends, Fluttershy finds a question about their relationship on the tip of her tongue.

Since The Friendship Games, Sunset and Twilight now have something in common: Magical transformations, an experience unlike any other that they both endured. Twilight now feels inclined to share her feelings about the matter. Though the circumstances were different and their reasons even more so, they can agree on one thing....

Featured 9/27/15

After the Battle of the Bands, Sunset Shimmer struggles to find middle ground between the person she wants to be and the person others at school expect her to be. Thankfully, Twilight Sparkle is a good listener and has enough patience for the both of them. [Post Rainbow Rocks, one-shot] [Slight Sunset Shimmer x Twilight Sparkle]

7/7/2016: Now with cover art designed by the very generous Novel-Idea! Thank you so much!