Well, when I say 'here' I mean I don't mean the Editing Cave. No, I left that cave last week. I'm next door now, in the Rewrites Cave. Adding in some bits to the next book, before I go back and see if the whole thing actually works or not. It's absorbing, and exciting, and terrifying, because I'm flying utterly blind here.
Still, if I'd wanted a boring job I wouldn't have become a writer.