Luna discovers something hidden from Celestia for twenty years, now, with emotions running high, she enlists the help of the Mane 6... but what seemed to be a single mystery, soon reveals a darker and much more complicated plot that will soon decide the fate of Equestria.

Check out the Empty Room TV Tropes Page (Warning: Spoilers!)

Revised chapters edits and proofing (with many thanks) by: lammy, Trevor, Nick Nack, Fifth Alicorn

While gem hunting, Rarity and Spike find a strange heart shaped gem. Rarity taken by the rock quickly adds it to a new dress. However when the gem begins to reveal its hidden powers both Rarity and her friends will be caught in the crossfire...

After an accident, Twilight's life is turned upside down and changed forever.
With her friends standing by her, she must manage to overcome new obstacles, learn a new way of life, and discover just how long secrets last when hidden from those who know you best.

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Now in audiobook form!: Youtube

Sharp Shadow is like any pony, just a not so normal family. Since Shadow's father was a programmer, he had been astounded by the digital world. He often told his son Shadow stories of a world where digital heroes fight evil. This place is known as the Grid. Sadly, he disappeared one night without a trace. Twenty years, after he suddenly vanishes, an old family friend comes to visit. He said he received a page from Shadow's father, and strangely enough, it came from an old arcade building he used to own. Wanting answers, Sharp Shadow looks in the arcade for his father only to find his greatest adventure yet! *First fanfic lol and is closely related to Tron: Legacy, like I mean, if you compare the movie to this book, they're almost exactly the same, just different dialogue and such, secondly I got this idea because I was a huge MLP and Tron fan so I thought why not mix both? You hve to admit, if you read it, it came out decent right? Plus, there's also a reference to the Tron video game Tron: Evolution.*