The History of Eora, Volume IX: The Birth of Engwith

 is a book and quest item in.

Acquisition

 * In order to get it, you'll need to sneak past a lot of Librarians, including a tight patrol route at the very end. They will attack you if you're spotted. Alternatively, you can just cut your way through.

Quest

 * Put on its lectern in the northwestern part of the Restricted Section. Activate the device to open the door leading to the western stairs to the Central Stacks.
 * Correct lectern (3rd from the left): "They looked upon the world as it was and were unsatisfied, so they remade it as they thought it should be."
 * The books needed are History of Eora volumes V, VII, IX and X.