For 3.5, I just have the PHB, MM, and DMG.
I can get a few ideas though. The village butcher has joined a cannibal cult and waylays lone travelers. What should be described about his lair? Does he leave dismembered victims alive after amputating a limb? What damage would they take from hanging skewered on some kind of wrought-iron hook? Descriptions from Diablo games might also work as a starting point.
RE: Michael's RPG Shelf: Supplements For Adding Horror and The Horrific to Your Campaign, Part One