If you're looking for action, or more specifically, letters to Penthouse, I think you have to go to their website and pay for that. Contrary to rumors, I'm not really an expert about how to find those.
However, since I have your attention, let me ask you a question. Do you live in a seismically active area? Have you considered stocking up on food, water and any medication you might need after an earthquake? Have you bolted heavy furniture to your walls and moved anything that could fall on you away from your bed? Does your apartment or house conform to modern seismic safety codes? If not, you've got bigger worries than finding letters to Penthouse.