Lulu & Ellie and the Book That Lost Its Ending
The Library at the Edge of Forever holds runaway sentences, a folded-paper dragon, and an ending that has not arrived yet.
Lulu wants to hunt down the missing final page. Ellie notices that the story is still changing around everyone inside it.
Riddlemere the librarian sphinx and Folio the folded-paper dragon help the sisters understand that the ending is not missing.
Some endings cannot be found early. They have to be reached by living the next part of the story.

