On the Motions of the Moons was a text by the Elabonian astronomer Volatin. It was a thorough description of the paths of the four moons, and correctly predicted the werenight. Had Gerin the Fox read closely, he would have been better prepared for that event. But he thought the book a mere curiosity, so he simply let it sit on his shelf.
Five years later, Selatre became enamored of the book when she was learning her letters, and saw that it predicted a mini-werenight during the Monster War.