Count me as a "fool" who didn't pre-order it. I cam close to pre-ordering it fucking years ago but in the end I did not, and for a good few years thereafter was quite happy that I didn't. For a long time it seemed like the book was never coming out!
I love Bava. I respect Lucas as an authority on Bava, but I really don't regret buying the book, in all honesty. Then again, I've not even perused its pages. Had I actually looked at the book, maybe I would think differently, I don't know.