From publisher blurb:
Hell to Go!
Nobody wants to travel to Infernus and if most PCs are lucky (or good) they never will. With this collection of 27 foes, fiends, and faeries you can now bring nine insidious and infernal cults to your campaign.
Each cult is styled after a different sin from the Nine Circles of Dante's Inferno, from the heathen faerie cult known as The Company of the Lady to the hedonistic nobles of The Salax Society, the vampiric perversions of The Sanguine to the decadent gamblers of The Seekers, the wrathful terror of The Thirteenth to the bloody fertility of The Fruitful, the lurking horror of the Shape to the madness of The Headless Crown, and the witches of the Black Goat ... all the obligations, rituals, holidays, organization, and places of worship are explored, complete with maps for each cult.
This PDF has a bookmarked table of contents, with monsters linked by challenge rating. Challenge ratings range from 1/8 to 18