Very cool. My first reaction was that there wouldn't be much of a market for this, but after reading through the thread you linked to it's clear there is.
It's not about market, although I'll be selling a physical copy. The digital will be free, as per Zed's example.
I care deeply about programming, and about preventing software from turning into a mass cargo-cult profession. I want more systems-knowledgeable people out there who understand how things are and could be built.
http://hackerne.ws/item?id=1873413