Long has the coffee branch of StarBuck been open in Canterlot and long has Celestia frequented it. She always grabs her order and returns to the castle to enjoy it, Luna however has been curious of the beverage known as coffee. So one day she sips her first drink....nopony was prepared for what transpired.

Dramatic Read of the fic! : Done by EnderBlaze

[Featured on EqD and FiM Fiction] It is that time again, the dreaded flu season. Not even Princess Celestia, the ruler of the sun and day, is safe from it. When Celestia contracts the flu, what pony could possibly nurse Celestia back to health? Why none other than her dear, loving sister of course! Enter Nurse Luna!

Between crazed guards, a palace staff desperate to please their rulers, and a crazed unicorn running around, no pony is safe from this madness.

This is 100% Approved by Twilight's Library.

This story is a sequel to Past Sins

Side-story to Past Sins - Spike almost lost Twilight to a hangmare's noose, but now Twilight is safe and Nyx is a filly again. Normal life is returning. Still, Spike can't ignore the fact that Nyx just isn't the same as he remembers her. Her temper is more volatile, and, when she gets angry, all he can see is the rage-driven Nightmare Moon of legend.

And thus Spike has to wonder: Is Nyx truly reformed, or is she one bad tantrum away from calling herself Nightmare Moon again?

This story is a sequel to Past Sins

Hearth's Warming is a time for friends and family to come together, celebrate harmony, and welcome the new year. Nyx is looking forward to just this as she rides the train to Canterlot with Spike and Twilight. She's going to meet her extended family for the first time and wants nothing more than to make a good impression. Yet, the sheen of the holidays can't hide the trouble caused by meddling grandparents, relentless reporters, and a paranoid uncle.

Princess Celestia tires of constantly being surrounded by decorum, deference, and formality, and decides to take a day off from being Princess. But visiting Ponyville incognito is harder than she expects. Will she be able to fit in and make friends without blowing her cover?

Luna and Celestia share a meal at the end and beginning of their days, but Luna has other plans

Cover art is care of Lamia, go support her work on her Deviant Art account, commission an image, because she's worth it

"A princess never dreams - they only have prophetic visions."
What if the Princess of Dreams cannot control her own dreams?
What if her dreams are a little more than a dream?
And what if her dream was a nightmare - of herself?
What if her sister also dreamt the same dream?
These are the dreams of Princess Luna and Princess Celestia, and more than one pony wishes it to be nothing more than a simple dream.
And where did the Princess's mother go?
Where is the Queen?

Cover art by the extremely talented Onyx Penstroke. Her DeviantArt can be found here.

Feel free to add this story to any group you see fit~

Luna, Princess of the Night, feels like she's under quarantine in Canterlot. Apart from Celestia and her personal aid, Scrivener Blooms, Luna is treated like Nightmare Moon by the residents of the castle. After a journey to Ponyville, however, Luna takes an interest in attempting to make friends and begins to yearn to see more of the world and to prove that she is back in control of herself and regaining her old strength.

A mix of romance, high fantasy, and magic, the story features the power of friendship, sarcastic wit, and adventure against darkness driven by Luna's brash, courageous spirit.

The first story of the Nátta Edda, and beginning of the Fimbulvetr Trilogy.

Celestia and Luna were orphaned as fillies, and lived their lives in poverty and innocence. Then, once Starswirl the Bearded enacted his spell, havoc wreaked in pre-harmonic Equestria, and the two sisters have to save it, beginning a new age. But even after Equestria is saved and harmony begun, there is still much left to happen.
Disclaimer: I don't own My Little Pony. This is solely for entertainment purposes.

Hear ye, hear ye, ponies of Equestria! Our benevolent Princess Luna hath taken it upon Herself to begin a column, in which She shall administer Her wisdom to anypony who so desires it!

Behold, the origin of the questions: Here and here.

All art used in this work was found at Royal-Exo's deviantart page—Luna suggests you check it out.