Riddley Walker
Imagine the Bhagavad-Gita as a Punch-and-Judy show. What do the legend of St. Eustace and particle physics have in common? In this unique novel, part mystical treatise and part fantasy-horror fiction, two millennia have passed since a nuclear war knocked Britain back to the Iron Age, and a semi-nomadic civilization has preserved only degraded fragments of our science through oral tradition in the form of puppet shows. Our narrator, 12-year-old Riddley, at first joins forces with a shifting (and shifty) cast of politicos and visionaries who hope to bring the human race back to its former glory by rediscovering the recipe for gunpowder. But soon he's on the track of bigger game: the nature of reality, and the causes of sin. Which is more fundamental, unity or duality? Why does Punch always want to kill the baby?
Source: http://www.amazon.com/exec/obidos/ASIN/0253212340/winningwriter-20