The next night, Zoe was late, and after fifteen minutes of twiddling their thumbs, Erasmus started the lesson without her.
“Do a page from your book, two if it goes easily,” Erasmus said. “Then you’ll spend an hour or so working with me.”
“Doing what?” Katie already had their book in hand. She tapped it with her wand, and it sprang open for her.
“That depends on what I see before we start.” Erasmus planted himself on his stool and settled back to watch.
Trying to ignore him as best they could, Penny, Katie, and Ellen stood before the book and watched text flow onto the next blank page.
“An extra-dimensional what?” Penny thought it sounded like science fiction.
“Extra-dimensional space,” Katie said.
“Hiding a space inside another space,” Ellen said.
“Why would you want to do that?”
