Here's a first glimpse of what the cover may look like, courtsey of Tom Williams at More Associates. This may change somewhat, as we are about to have a discussion with production people on the greenest approach to both the cover material (and whether it will even have a paper cover or we will print straight onto the hardcover underneath) and the inks used. This could certainly affect the colour scheme we use. But the intention is to do the cover with one colour and typography, to make something simple, bold and authentic - with a much lower impact than glossy photography and paper stock.
I love it already anyway, comments welcome as always.
ps The thing about refusing a plastic bag was Nick at John Wiley's idea, and I have to say they are really getting behind the whole concept. They have also decided to go with FSC paper stock and yet to price the book very accessibly (you can get it on Amazon for about £10).