I wanted a copy right away, so I got one. I was very impressed. I haven’t read every word yet, especially stuff that I already know about. So if page 67 has a misplaced comma or something, mea culpa. But I did already pick up a few new things despite my experience level. What’s most important about the book, to me, is that it will help bring MODx to a larger audience. It will help someone new learn the system a lot faster. All my learning was haphazard and random, but with enough fumbling and help from you folks, I got up to speed. I was confused a lot of that time, but could tell that it was good enough to keep chipping away. If I had had this book, it would have been much faster and easier. And when I noticed that Shane and Susan O were involved in parts of the process, that boded well!
I would guess that a hardcore coder, core hacker, plugin author type person may not be as impressed, as it doesn’t go into these in great depth, though there are some very good intros. This audience will say "I knew all that".

I look forward to dissenting or different views. One person’s viewpoint is intrinsically limited. I fall about halfway between hardcore coder and frou frou designer.
I’ve done a review of it on my blog for anyone interested. The review is more for a general audience than a MODx audience. And yes, though I like MODx and the book so much that it’s almost a puff piece, I don’t worship them, so bear that in mind.
http://davidchu.net/wblog/index.php/2009/05/modx-web-development-a-book-review/
Time allowing, I’d be willing to answer general questions about the book. To get yourself a copy, you can go to
Packt publishing here.
Cheers.