In which inspiration strikes

I've been avoiding thinking about the next Cabbage Soup exercise. We're supposed to be writing chapter headings and an introduction to the non-fiction book we feel most qualified to write. The trouble is I'm not sure I know any subject well enough to write a book about it. Given lack of outstanding expertise perhaps the thing to do is to go for a subject area where there are lots of worthy but boring books published, and write one that's just a bit weirder? Hmn, I think I've just had an idea...