I think when people mean that Discworld books have become darker they really mean the series is growing up. In 'The Colour of Magic' most of the city is set alight. It's a joke, in much the same way that the Earth is destroyed almost at the start of Douglas Adams's 'The Hitchhikers Guide to the Galaxy.'

I grow as many of our vegetables as I can, because my granddad was a professional gardener, and it's in the blood.

I am certain no one sets out to be cruel, but our treatment of the elderly ill seems to have no philosophy to it. As a society, we should establish whether we have a policy of life at any cost.

I particularly admire are Mark Twain and Jerome K. Jerome who wrote in a certain tone of voice which was humane and understanding of humanity, but always ready to annotate its little foibles. I think I'd lay my cards down on that, and say that it's that that I'm trying to do.