Five Crumbling Books on a Shelf that Smells Faintly of Dust and Ink is a Morlock engineer of Krisek Yor, who is one of many that work alongside Three Mushrooms Concealing the Name of God to maintain the mycelium network that contains their people's history.
She is trying to devise a way to separate the mycelium and allow them to take the information with them. With Bhaltair's assistance, she made some progress in 25. Mycelium Memories