I was asked recently in the hallway at church if I had any literature that might be good to hand out to non-members on the basics of preparedness and food storage. A good friend from a neighboring stake put together a beautiful informational newsletter on building a 3 month supply that I would class among the literature that would be great to give to someone not of our faith. It has great info on why a 3 month supply is a good idea...shelf lives of various products...shelving systems...etc...and it all fits in just 3 pages! It does have a few quotes from the prophets...but shouldn't come off too "churchy".
The newsletter can be downloaded from his site called "Principles of Preparedness".