Devils, demons, and daemons--these are the ultimate servants of evil. Learn all their foul secrets in the Book of Fiends, the definitive sourcebook on these fell creatures. This tome collects Green Ronin's critically acclaimed Legions of Hell and Armies of the Abyss sourcebooks and combines them with the long awaited treatment of daemons, Hordes of Gehenna. All the fiends have been updated to the 3.5 rules, and the material on demons and devils has been revised and expanded. Details on the plane of Gehenna, its rulers, and inhabitants are also revealed for the first time. The Book of Fiends is jam-packed with evil for your campaign, including: