Unnamed sister school

Description
During Nancy's orientation, Lundy explains that there is a sister school in Maine for students who hated their travels to other worlds, and want to learn how to move on and forget.

When Nancy asks Kade why he isn't at that school, he explains that even though he doesn't want to go back to Prism, he doesn't want to forget what happened there as it made him who he is, making him a "loophole kid".

Seanan McGuire said that she may never visit this school in the future book, but that she had to mention it in Every Heart a Doorway in case she changes her mind.