I'm glad to see a good thread on this book. It's not like a normal 'workshop' book - it explains how he came to his conclusions, rather than just what those conclusions are. I think that some people find it a hard read because it is not an instruction manual - if I wanted help on a particular issue, I wouldn't go to this book: it's rather a book on methodology. I have found it invaluable in regards to the idea of previsualisation, especially for my still life stuff, and I don't think I would be half the photographer/printer I am (and I'm still not much of one) without this book (and being a shameless self-publicist, the Portfolio section of January's B+W Photography (UK) shows some of these prints).
I think it's an excellent book to keep on your coffee table and pick up in the occasional quite moment you may have.
Les: I, too, would be very interested to hear of any up-and-coming workshops he will be doing in the UK. And any of yours, come to that.
Geoff