Green Ronin took you to the Pit in Legions of Hell, giving devils their due. Now its time to take a tour of the Abyss and get an up-close and personal look at the masters of chaos, the demons. An endless variety of demons populate the infinity of the Abyss, and volume 2 of the Book of Fiends gives you the lowdown on over two dozen new demons and more than a score of demon princes.

The book also introduces the thaumaturge, a new divine spellcasting class that gains its powers from demon princes ... for a price.