Surviving the apocalypse

The post-apocalyptic worlds that we've seen showing in the movies and TVs lately were zombie infestation, viral outbreaks, alien invasions, doomsday prophecies, etc. It's getting a bit over-repetitive and boring, too much drama, and there were so many of such movies that came out before and after our supposedly the end of the world (Remember 21 December 2012?). I suppose that why reading this book was much more refreshing and has more sense of reality to it.