It turned out that Twilight often read out loud to herself. Amethyst didn't comment on it, as many ponies read aloud, plus, the legend was actually quite interesting if one knew about it in detail.
"Once upon a time, in the magical land of Equestria, there were two regal sisters who ruled together and created harmony for all the land," narrated Twilight. "To do this, the eldest used her unicorn powers to raise the sun at dawn; the younger brought out the moon to begin the night. Thus, the two sisters maintained balance for their kingdom and their subjects, all the different types of ponies. But as time went on, the younger sister became resentful. The ponies relished and played in the day her elder sister brought forth, but shunned and slept through her beautiful night.
"One fateful day, the younger unicorn refused to lower the moon to make way for the dawn. The elder sister tried to reason with her, but the bitterness in the young one's heart had transformed her into a wicked mare of darkness: Nightmare Moon. She vowed that she would shroud the land in eternal night. Reluctantly, the elder sister harnessed the most powerful magic known to ponydom: the Elements of Harmony.
"Using the magic of the Elements of Harmony, she defeated her younger sister, and banished her permanently in the moon. The elder sister took on responsibility for both sun and moon and harmony has been maintained in Equestria for generations since. Hmm... Elements of Harmony?" She paused for a moment. "Do you have any books on the Elements of Harmony?"
Amethyst quickly looked through all of the neatly organized books, before gently pulling out one with her magic and setting it in front of Twilight. "Here you go, The Elements of Harmony - A Reference Guide."
"Thanks." Twilight quickly flipped open the book with magic, and started talking out loud once again. "There are six Elements of Harmony, but only five are known: Kindness, Laughter, Generosity, Honesty and Loyalty. The sixth is a complete mystery. It is said, the last known location of the five elements was in the ancient castle of the royal pony sisters. It is located in what is now the Everfree Forest."
Amethyst couldn't help but shudder at the mention of the Everfree Forest. Sure, Zecora the very friendly zebra, lived in it, but she had spells and potions to protect her from the many creatures in it. The only other ponies that had dared to enter it were Rainbow Dash (by mistake, actually) and Fluttershy, due to hearing an animal's cry of pain and wanting to help.
"The Mare in the Moon is myth from olden pony times," continued Twilight. "A powerful pony who wanted to rule Equestria, defeated by the Elements of Harmony and imprisoned in the moon. Legend has it that on the longest day of the thousandth year, the stars will aid in her escape, and she will bring about nighttime eternal!" Her eyes widened in surprise. "That's today! I need to go tell the Princess!"
Twilight sprinted out of the library without so much as a word to Amethyst, who stared after her in surprise.
"Well, that was abrupt..." she muttered to herself, while picking up the books with her magic. "She can't really think that this old legend is true... Though... I have read several books about the Elements of Harmony, and those seem to be real..." Instead of putting the books away, she gently placed them down on her desk. "I'll keep these out, just in case I need them."
"Hello, Amethyzt!" said an accented voice from the door, catching her attention. "Twirly said zat you vanted some zented candles?"
"Oh, why thank you, Lotus!" said Amethyst to the blue-coated and pink-maned spa pony, who was holding a small bag of said candles. "I was going to go over and grab them myself, but I got a bit distracted."
"It'z no trouble at all. Buizness iz a bit slower on days like today, zo I don't need to hurry or anything."
"What scents are they?" Amethyst carefully took the bag in her magic and opened it up.
"Rose. I though you would like more zan just lavender vuns."
She smiled, and gently set the candles down on her desk next to the books. "Thanks, Lotus."
"You're velcome." She smiled. "I just can't vait for the Summer Sun Celebration! I'm sure you did an excellent job on making sure everything was all set up."
"Hey, I'm just being helpful towards out community."
"Zen you are very helpful towardz our community. See you at the celebration!"
"Bye!" she called as Lotus Blossom walked back towards the spa. "And also, thank you Twirly. Huh, she must be getting faster..."
"That breezie is so slow!" called down a voice from above.
"I'd like to see you fly fast with wings that are designed to remain stationary, Rainbow," said Amethyst sharply.
"It's still true!" replied the pegasus, landing in front of her. "I've seen Fluttershy go faster!"
"You do realize that Fluttershy can fly faster than you when she puts her mind to it, right?"
Rainbow laughed. "Yeah, right!"
Amethyst rolled her eyes. "Your top speed is around eighteen point two wing power, but I've seen Fluttershy fly at twenty point seven to go catch a squirrel that had fallen out of a tree."
"Whatever you say, Sparky."
"Sparkler."
"Whatever. Anyways, how come you got to go see the Wonderbolts early?" Rainbow flew right in front of her. "They don't need some random pony like you to watch them! They'd rather have somepony like me to watch them so they can watch me so I can be a Wonderbolt.
"Do you still not realize that I help organize things?" asked Amethyst. "I was checking to make sure they had all of their equipment. Also, if you're going to try to watch them practice without being seen, at least try to be more subtle about it."
"I wasn't watching them! And I was totally subtle!"
"You do realize that those two statements contradict each other, right?"
Rainbow glared at Amethyst, before flying off with her usual rainbow contrail behind her. Amethyst sighed, and walked back into the library. She was going to get her reading done before the Summer Sun Celebration.