Inky Pie has a nightmare, and her concerned sister fetches their mother.

"Applebloom!"
"Sweetie Belle? What's wrong?"
"It's Scootaloo, she... she..."
"What? What happened?"
"She's... she's gone!"

(AN: First chapter is one story, all chapters after it are a "sequel" which is better written than the original.)

"Applejack?"
"Yes Twi?"
"I found this book outside the Everfree Forest... It seems to be Apple Bloom's diary."
"Mah sis kept a Diary? Does it say what happened to her?"
"...Yes..."

TheLostNarrator did a fantastic reading of this story some time ago; find it here.
Now with a reading in Finnish, courtesy of DubbiKnight.
And a reading by Lotus Moon.

One hundred years after Celestia sacrificed herself to destroy Nightmare Moon, ponykind continues on. Equestria is now almost completely covered in wild forest, and new and fearsome creatures threaten anypony who wanders to far away from the road.

But now, a new threat begins to reveal itself, and with it, a new hero must rise against it.
One problem: that pony is Rat.
And he has no idea what he's doing.

(AN: Updates will be infrequent. Also, any and all feedback is appreciated!)