After finding Discord hiding out in his closet, Twilight Sparkle soon learns the most horrible of truths about herself and the world surrounding her.

And then she learns another truth.

And another. And another. And...

After a harrowing and dangerous quest, Twilight Sparkle and her friends have recovered Excelsior's Ecstatic Codex from an evil zebra cult intent on ending the world. The Codex, one of the greatest works of dark magic ever forged, carries within its pages a limitless collection of vile, twisted spells, all specially devised for anypony who opens the cover.

What do you do with a book of dark magic? If you're Twilight Sparkle, you put it in your library. Because that's where books go.

After all, books are for everypony.

Twilight Sparkle never seemed to notice Lyra Heartstrings. She didn't even remember Lyra's name.

They were friends back in Canterlot and even went to school together. Yet Twilight didn't notice that Lyra just happened to move to Ponyville the same day she did. She didn't even notice when Lyra appeared at her welcoming party. Nor did she ever seem to spot her old classmate passing by in the background on any other day during her stay in Ponyville. Some days she could look right at Lyra and never realize that they knew each other.

Lyra isn't a very noticeable pony. She has put a lot of effort into that.

Set in late season 5, after Amending Fences.
Note: Lots of spoilers in the comments.

Rainbow Dash wants to write a rap. Somehow this leads to Sunset Shimmer explaining how magic in Equestria works.

Warning: Contains rapping, logic, and stupid headcanon

Spike now harnesses the bloodstone scepter making him the ruler of all dragon kind. Of course he hands it off as part of an important lesson on friendship, right? Naw. He immediately goes mad with power.

When Twilight is attacked and nearly killed by a madpony claiming to be her brother, she, the Princesses, and the rest of the Elements of Harmony find themselves saddled with a shellshocked soldier who would like nothing less than to end her life. While they help him adjust to normal life, he makes his story known - and what he claims causes them no end of worry.

This story is a sequel to Changeling Courtship Rituals

Queen Chrysalis attacked Canterlot, brainwashed Twilight Sparkle's brother, kidnapped her former foalsitter, defeated her mentor in combat, and conquered her kingdom. She kidnapped the sisters of Twilight's friends, turned them against one another, and tried to drain all of Twilight's magic. Queen Chrysalis has, at every opportunity, done her very best to utterly destroy Twilight Sparkle's life.

For some reason, this has not caused the pony to fall in love with her.

However, due to Twilight's misunderstanding of changeling customs, it does mean they are now married. Twilight eventually managed to tell the Queen the truth, but she forgot that whether it's a kingdom or a heart, changelings conquer.

And since the changeling way of conquest didn't work, Chrysalis is determined to try the pony way. The only problem is, of course, she has no idea what that is. But she knows someone who does: Princess Cadance.

Now, with the absolutely sincere help of her mortal enemy, the pony she once locked in the caves beneath Canterlot while trying to steal her husband on their very wedding day, Queen Chrysalis is going to woo the sister-in-law of that very pony.

Surely this is the most perfect plan ever devised.

***

Proofread by ShutterflyYay.

Takes place roughly after season five (so Starlight Glimmer is running around occasionally)

For years, Twilight Sparkle and Queen Chrysalis have been at each other's throats. Both have experienced victory over the other, and both have experienced defeat. Out of all the creatures in Equestria, none despise each other the way the pony Princess and changeling Queen do. They seemed destined to remain locked in battle forever, or at least until one is finally dead at the hooves of the other. The cruel insults, the vicious loathing, and the powerful spells that have passed back and forth between them at each meeting have become the stuff of legend.

Imagine Twilight's surprise when she finds out changelings consider this dating.

And now they're married.

***

Sequel: Pony Courtship Rituals

***

Some beautiful fanart of the end of chapter three was done by Dmann892; you can see it here.

More awesome fanart, this time from chapter one.

Now with a TvTropes page (obligatory TvTropes warning goes here).

If you want a Russian translation, you can find it here.

There is now a reading of the story on Youtube, which starts here.

"Hey, you used to be Celestia's student, right? Did you know Sunset Shimmer?"

Twilight finds a hidden book in the Royal Canterlot Library, though she might not like what it tells her.