Do you have a mailing list or anything for when the book is done? (If you look at my HN profile I've got an email address you can stick on it, if you set one up later.)
I do find myself wondering if perhaps the book will face an issue from missing tone & body language that naturally happens in a talk. If I were to go kinda far out on the crazy idea scale, I would consider borrowing something from the indie video game world; you can do a lot of setting the tone of a long series of text snippets by recording high quality voice samples. Once we have the sense from high-quality voice acting, we can fill in the gaps from there. It might be interesting to experiment with pairing the book with a presentation given on the first chapter in video form, which would then set the tone for the rest of the book. (I think people, rather understandably, have a lot of preexisting emotion they are bringing to this topic, and it may be worth taking extra steps to try to defuse it, so you have a chance of communicating your points.)
Crazy thought, anyhow.
Yes, adding you to mailing list...
Love the idea of turning the book into a kind of video game; also thinking of building some tools that will make it easier to implement ideas, and buidling community around the book...