I can't say that I've ever read a book on writing. (could be the reason that I am, as yet, unpublished, huh?) It's not that I've never owned any, I just never read them. I'm sure there useful, and I'll probably crack them open at least once before I'm published, it's just that at the moment, I want what I write to be a 'pure' stream of my writing. Not something that I have to think about the "rules" of writing every second. Maybe when I'm done I'l go back and see everything that I've done wrong.