Yet More Questions is a tome in Diablo III that can drop from any Unique Monster in Set Dungeons.
It reads as follows:
The portals defied my attempts to shut them, but that no longer matters. There is something about these dungeons, a pattern that I can't quite see. But I feel it. Constantly. I am continually rebuffed in my attempts to best them, but it is only a matter of time. And these messages. Who or what is the Alliance of the Dying Sun? What is their purpose?