A tome said to contain the true name of every demon in existence. Varedis power may be connected to the book, as ripping the pages from it takes some of his power away.
The book is returned to you when you start the next quest called N  .
Book of Fel Names as a quest objectiveEdit
The Book of Fel Names is nearly inspired in H.P. Lovecraft's Necronomicon, which means Book of the Dead Names.