I have strong doubts about this, js1138. If one studies the laws of nature, is one studying something "physical?" What about mathematical reasoning -- is doing math "physical?" Or are these things exercises of faith?
That's a subject of debate. We probably have a better record of the history of math than any other kind if history, but aside from counting, math is pretty self-referential. It is true because we manipulate the axioms and operators to make it true. Rather the ultimate tautology.
That's my opinion. I admit to being over my head here, so I'm going to bail out of the discussion at this point.
Check out my links, and if you get the opportunity, check out some of the work being done in cognitive neuroscience. I don't see how you can write a book about consciousness without studying what science has learned about it.