"There's a small repository in Gao Ling."

"A nearby town?"

"The closest big one. Three days east."

"Thank you! I'll be sure to check them out, then."

"Mm."

"Any book or other library recommendations?"

"That's the only one I've been to. The one in Ba Sing Se is supposed to be almost as big as the Lost Library of Wan Shi Tong."

"A Lost Library?"

"Wan Shi Tong, He Who Knows Ten Thousand Things. A spirit. His Library is supposed to hold all the knowledge of the world, somewhere in the Si Wong Desert, but no one's found it in centuries."

"Sounds like a challenge! Is he more likely to appear if you bring new knowledge? I memorized a significant number of books from my homeworld, and could copy them over."

"I don't know."

"Would you like to join me?"

"...That's only slightly less a questionable decision than raiding a battlefield with you."

"Aw. I promise I'll keep you safe, to the best of my ability. And you'll get books out of it."

"...How fast can you go?"

"Multiple times the speed of sound! And my girlfriend can teleport."

A day trip to look for Wan Shi Tong's library.

"We'd have to be back by tonight."

"Certainly! Should I write out the books ahead of time, do you think? Though that would require materials..."

"There's not enough paper in town for multiple books."

"Unfortunate. I might just dig through my seals, see if I have any already written and packed away - even though I can memorize them, I love the feel of a book..."

"Seals?"

"A rather excellent type of magic from my home world! It's a way of folding things into other things, through magical writing - so I could turn a book into a single inked symbol, and have a book of books, so to speak."

"Sounds useful."

"It is! Unfortunately, it takes quite a while to teach someone..."

"Of course it does."