Well I've recently reread Only You Can Save Mankind and Johnny and the Dead. I think that the last time I read them was when they first came out. It was quite a revelation to read them again.
Only You Can Save Mankind seems to have a subplot about how killing on computer games has changed the way we look at real warfare. The story seems to be taking place during Operation Desert Storm. I can still remember watching the war on CNN and the so-called Smart Bombs that we were told could destroy a building with pin-point accuracy. Watching the war unfold on TV seemed to have a certain unreal feel about it - like a computer game.
Johnny and the Dead is partly an anti-religion book (surprise

). The dead are staying close to their graves waiting for the Day of Judgement instead of experiencing life - or the afterlife. There are some familiar themes in there that a Discworld reader would certainly recognise. The ultimate message, that cemeteries are for the living, not the dead, is a good and well thought out one.
I don't think I've given the stories away. If you haven't read the Johnny books, they are well worth a look.
