From the Introduction:
This product is an excerpt from Spellbook Games' Inferno: Bestiary, intended as a companion volume to Spellbook Game's Inferno: Journey through Malebolge. It only provides details about the Devils, Angels, and some Demons and other Creatures which occupy Inferno, and does not contain descriptions of the many other beasts, plants, and creatures that may be found in Hell. The creatures described here are the minimum necessary for a Games Master to effectively use the Inferno: Journey through Malebolge module/setting. A Games Master who does not have the complete version of Inferno: Bestiary will still have to make up some creature descriptions or substitute creatures from other sources. We recommend purchase of the complete Bestiary.