Reviews are coming in from the tech editors, and it's all sounding very encouraging and helpful. People are actually saying things like "wow, I'd actually buy this book!".
It had been a bit discouraging at first to see that all the past year-and-then-some's labour on the book added up to not much more than 200 pages. But I consoled myself: "They're dense pages! It's like writing at least a dozen articles, plus the work of fitting them together!"