Thanks to Decepticon Soundwave for the inspiration!
Even at a young age, Twilight Sparkle had always loved books. She was somewhat of a local legend at the Canterlot Library, where she spent hours almost every single day with Shining Armor. Sometimes he would read to her, other times she would curl up in a corner with a stack of books and just read by herself. She had only recently discovered her cutie mark a few months ago, and her time to read since then had been rather disrupted by the ongoing care of the baby dragon she'd hatched.
Twilight didn't entirely mind this new development, as dragons were an exotic species that gave her an excuse to read even more. The only difference was she was reading more books lately of a biological nature than usual. She'd been up on the third floor of the Canterlot library with Spike, after her brother had dropped her off to go find some mystery novels. That had been almost an hour ago.
Twilight had her back turned when a familiar voice addressed her.
"Twily? What are you doing?"
The lavender filly turned to face her brother, who had a look of confusion on her face. Surrounding Twilight was a half completed fort of sorts, with lots of free standing books standing upright surrounding it.
"I'm making a book fort!" She announced. "A solitary and secure place where I can do my reading!"
Shining Armor facehooved. "Twilight, first of all, you can't just be taking books off the shelves of a library to make a fort."
The filly's ears pinned.
"Secondly, you're going about it all wrong. You have no structural support in place, an attack from the back could knock out your whole foundation," he grinned.
"I haven't built the foundation yet, I'm building it alphabetically!" Twilight protested. "The alphabet starts in front, and works its way towards the back. All the books in the back will be about Zephyr and Zebras and Zoology."
"A book fort doesn't have to be alpha-"
"A proper one does!" Twilight insisted.
Shining sighed. "Alright, just make sure you clean up when you're finished. And keep an eye on Spike, don't let him wander off."
Shining Armor departed, and Twilight quickly gazed about for the baby dragon, who was chewing on the spine of a particularly large book. Twilight stomped her hoof down, and the whelp knocked the formerly upright book to the floor.
"Oh, Spike, look, you've destroyed one of my buildings! Now the townsponies will have nowhere to buy fresh asparagus," Twilight said, and closed her eyes to focus on righting the book. In the meantime, her imagination plunged into overdrive, and Twilight was immediately assaulted by screaming ponies who ran past her in the opposite direction.
Opening her eyes, Twilight found the Library was on fire. Of all the worst possible things that could happen, a destroyed library filled with burning books was certainly at the top of the list! An angry roar directed her gaze upwards, where a massive baby dragon was clawing at the remains of what had once been a perfectly sturdy roof.
"Run, Twilight! Spikezilla is on the loose!" yelled a green mare as she passed.
Twilight was unphased, and stomped her hoof down again. "Nopony destroys a library on my watch and gets away with it!" She fired a warning bolt from her horn towards the rampaging monster, which bounced off his scales as effectively as one throwing a bit at a concrete brick. The dragon roared in annoyance.
Not in the least ready to give up, Twilight roared back.
"...Grawr!" Well, that was a fail.
Spikezilla just laughed, and lunged forward to swipe at her with his claws. Twilight knew that if he grabbed onto her she would never be able to escape, and dove for her life underneath a nearby table. Spikezilla was too big to fit inside the building, but that didn't mean he couldn't knock the building down.
"Ha! You'll have to try harder than that!" She announced, retaliating with a spell of her own. A flaming ball of fire shot from her horn, although no sooner had it left her horn then she blinked in realization. "Wait, aren't dragons immune to..."
The monster swatted her attack away as if it was nothing, and returned fire on his own terms. Quite literally, in fact, a much more impressive ball of white flame shooting from his mouth like a cannon. The roof was collapsing in on itself, and Spikezilla continued to tear the library apart with his bare claws, wooden beams snapping in half like toothpicks. He was after Twilight now.
Twilight raced away from Spikezilla, ducking and weaving between falling debris. She found herself up against what used to be the staircase, a gaping hole which blocked her progression. The stairs were nowhere to be seen, and Spikezilla was closing in fast. Twilight spun around just in time to see heavy purple claws grab hold of her tail, and lift her up into the air. She thrashed and cast spell after spell, but none of them seemed to be doing any good.
Spike threw her with all his might across the room, sending the unicorn crashing into the crumbling walls with debris clattering down on top of her. Twilight barely had enough time to erect a force field before the behemoth grabbed her yet again, this time bringing her closer to his gaping jaws and jagged teeth.
Spikezilla just roared with victory, dropping the terrified pony through the air into his waiting jaws, and-
"Twilight, what are you doing?"
The purple unicorn lay on the floor in the middle of an enormous pile of books. Spike lay contentedly next to her, chewing on her mane and drooling all over the floor.
"Twalot!" The dragon cooed.
Twilight looked up to see Shining Armor, glaring down at her disapprovingly. Even as he did so his horn glowed, beginning the long and laborious process of putting books back where they belonged. Treating books in such a manner was completely uncharacteristic of her.
"Twilight, look at this mess. What do you have to say for yourself?"
The young filly looked at the oblivious dragon.
"You win this round..."