It occurred one peaceful night. Half of Equestria awoke to the sound like a double-shot thunderclap. A percussion heard in the skies and rattling windows from Apploosa, to Canterlot, to Ponyville. Nopony knew what it was or what it heralded for the world as it drew a line across the nation.

For Twilight Sparkle, this isolated incident might have faded from memory after a time, if not for the strange rumors of a creature sitting on the hill on the outskirts of town.

These are her thoughts given written form. These are Sparkle's Notes.

Report EVERYTHING to the Princess.

We all wear a mask called composure, beneath which hides a heart that twists with guilt and hidden feelings. Regal as she is, Princess Celestia is no exception. What might be revealed should circumstances cause this mask to slip - or break?

Set several years after the potential conclusion to the series.

After Big Macintosh helps the Mane Six out of a jam, he finds his ordinary life of
peaceful routine thoroughly disrupted by the various misadventures those crazy
ponies always seem to get themselves into.

Artwork provided by the talented Zemious

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.

When Lance Strongshy's medical career is endangered due to relentless nightmares depriving him of sleep, his daughter Fluttershy once again overlooks the horrible past she suffered at his hooves and enlists the help of her friends to cure him. But, when the only sufficiently expedient solution turns out to be a certain spell that Twilight was instructed to never cast again, it becomes uncertain if their efforts will save him, or utterly destroy him.

A sequel to JakeHeritagu's Silent Ponyville 2, read that first if you haven't already: http://www.fimfiction.net/story/4868/Silent-Ponyville-2

And THAT one is the sequel to JakeHeritagu's Silent Ponyville so if you haven't read either here's where you should start: http://www.fimfiction.net/story/106/Silent-Ponyville

(First cover art by http://manwhomurderedtime.deviantart.com/ )
(Current cover art by http://www.fimfiction.net/user/SamRose )

The storm is breaking on the Horizon.

It's been two months since the battle against Nightmare Moon. Luna is recovering, Celestia is busy turning the government back into a diarchy, and the Mane Six have returned to their lives. All seems well, but when Celestia discovers that half of the power of the Elements of Harmony have been transferred to each of the Bearers, she decides to send thirteen mysterious members of the Royal Guard to monitor them as they manifest and develop their new abilities.

The sins of a forgotten war still linger, and an ancient evil lurks in the shadows, just waiting for the right time to strike. The Mane Six suddenly find themselves once again at the heart of a conspiracy to bring about Eternal Night, and only by awakening their powers and realizing their full potential can they do anything to stop it. Friends both old and new will help them along the way, and an unseen force will guide them as it seeks to right a wrong made thousands of years ago. The Bearer's journeys will take them outside the borders of Equestria and into the world beyond, and when they return, they'll have the power and experience necessary to save the world and bring about balance in all things.

The Powers of Harmony TV Tropes Page (SPOILERS)
The Powers of Harmony Art

Thanks to Wildy71090 for the cover pic.