I didn't read it, because I know the topic already, but also because I found it too long for an overview. If the crowd with reduced attention span is your target group, this doesn't work. This would amount to a 20 pages perhaps. I'd assume that's roughly how much it would need in the 600 page book, too.

Also, there is no TOC to gloss over, the ascii, cute as it is, is harder to fly over than legit text with embedded code snippets.