several months later ...

"Hey Twilight," said Rainbow Dash, entering the library wing of [Ponyville Crystal Friendship Castle —the Editor]. Twilight looked up from her work with a look not so much like annoyance as sheer incomprehension; she had to remember the mundane physical reality around her before she could resent its intrusion into her studies. Some of her other friends, say, Rarity, or Fluttershy (definitely Fluttershy), would have apologized for the interruption. Rainbow Dash didn't notice. "I came to return the non-Daring Do book you recommended."

"Oh!" said Twilight, now aware enough to resent the interruption, but not resenting it, because if there was one thing the world outside her head was good for, it was sharing her love of reading with friends and hearing back about the results of said sharing. "What'd you think?" Twilight wasn't sure what to expect; Rainbow had descibed the purpose of her visit in her usual confident tone, which good have meant any number of things, from "That book was awful and now I'm going to justly complain about it", to "That book was great and I'm going to justly rave about it," to "I'm Rainbow Dash!"

"It was terrible!" said Rainbow Dash.

"What? Why?"

"It was nothing like the Daring Do books!"

"Rainbow Dash, it was exactly like the Daring Do books! I mean, it's not literally A. K. Yearling writing about Daring Do, but it's another popular writer working in the same very crowded, dare I say played out, subgenere of adventure novels."

"The protagonist is nothing like Daring Do! She's so&dmdash;somdash;"

"Yes?"

"She lacks a certain jeh neh say-is kwoi."

"Je ne sais quoi," corrected Twilight. "But Rainbow," she added, changing the subject [for all the world as if she were a puppet in a throwaway collaborative storytelling session in which one of the authors is suddenly realizing that he's taking too much time on the introductory scene —the Editor], "do you ever think about other worlds? I mean real other worlds, not fantasy-adventure novels like Daring Do."

"But Twilight, Daring Do is real! We met her back in [My Little Pony: Friendship Is Magic Season 4, Episode 4: "Daring Don't" —the Editor]!"

"I don't know what you're talking about," said Twilight. "Anyway, I'm a little even more distracted than usual because I'm actually in the middle of reestablishing a connection to an alternate world that seems to have a strange lack of magic; they've managed to build a sophisticated communications system out of some sort of electomagnetic technology which I was able to tap into once, a few months ago before—before—" a single tear rolled down Twilight's cheek.

"Still miss the old library, huh?"

Twilight sniffled and nodded. "Yeah." Then she shook her head vigorously and put on a determined look. "Anyway, I was worried that I might never be able to reestablish the connection, but after the good practice with trans-world communication duing [the events of My Little Pony; Equestria Girls: Rainbow Rocks —the Editor] and that similar time I chatted to that annoying little colt and one of his superheroine gaurdians, I think I'm ready to reinitiate contact with an old—well, I don't know that were friends, yet; it was only a few minutes. But there's a pony—uh, well, a probably-not-a-pony, whose world I want to learn more about, a writer, like A. K. Yearling."

This was sufficiently weird even for Twilight that Rainbow Dash actually looked a little curious. "You can watch if you like," said Twilight.

"Okay," said Rainbow.

Twilight took a deep breath, and, horn glowing with effort, watched in awe as a quill wrote out the cryptic words—