I feel much better

I’m always a little leery of technical editors, because I know how most publishers choose them: they look for someone who a) is breathing and b) can spell the name of the product or technology covered in the book. I’m fortunate that MS Press chose Tony Northrup as their TE for this book; his comments have uniformly been useful (even when I didn’t agree with them), and he’s caught a bunch of my stupid mistakes before they got out into the wild.
There are a number of volunteer TEs, too, whom I’ll be introducing over the coming weeks. In particular, a number of Microsoft PMs have volunteered to review material related to their domain expertise, which is really helping strengthen coverage of some key areas.