Abyss


 * Canon:Abyss for the encyclopedic article on the Abyss.
 * Publication:Fiendish Codex I for the 3.5e publication devoted to the Abyss.
 * Publication:Manual of the Planes (3e) for the 3e publication devoted to all planes, including the Abyss.
 * Liber Demonica (3.5e Sourcebook) for the homebrew sourcebook on revamping the Abyss for the Wizard Balance point play.