I just finished Canticle for Leibowitz. Took me awhile, a bit of a boring read. The premise is after the bomb, society will crumble and it's only salvation is the catholic church. Right after the balloon went up, an engineer and a bunch of scientists decided to get together with some monks and store all the information they could. Society decided to kill all men of learning and burn all books, because they were so pissed that technology had made their world into an irradiated waste land. So these monks became "bookleggers". After a hundred of years or so, of copying and recopying any text they could find, they had no idea what any of it meant. One guy made an illuminated gold leaf copy of an electronic schematic. Crazy stuff.
It goes on to detail three ages. A few generations after the bomb, few hundred years later when there is a new renaissance centered around the abbey of Leibowitz, and even farther in the future when space travel is possible. Nice to read a cold war era, pre Mad Max apocalypse story. I like Mad Max, but it seems like he turned the irradiated future into a place full of hard ass punks in muscle cars. Anyway, this book works as inspiration for Gamma World cryptic societies, and a less gonzo view of what happens when society crumbles.