Any information on their personal stories ?
There is an art book that I expect should have more info, but the story stuff in the rule book is slim on Hell Club info.
From another thread:
*) it doesn't give bios on the Men of FAITH or the two exclusives with Apocalypse as I recall, just little stat blocks and pictures.
*) some detail on the sin creatures, controllers, Apocalypse beasts, etc. would've been nice.
*) some more fiction on the Hellfire club to explain their backstory would've been good.
*) bios on all the other hero characters, and they're surprisingly decent!
*) some actually good fiction, that really gets you into the mood.
*) some bios on the Hellfire club figures, and what they're up to.