I appreciate the intent, and I can only speak for myself, but I would re-iterate that the usefuless of the material in the book is limited by the fact that I cant (easily) use it in the field as a kind of step by step tutorial. And for me at least, I think I would be MORE inclined to keep coming back to the site regularly and probably have a richer experience on the site, posting some of my work where I had actually been practicing some specific part of the tutorial.