[drd]

Rob, I think your idea (your book) is really innovative. Many people don't realize what they can do with what is available to them. It is a long time I am using PHP for text processing, e.g reverse engineering on embedded systems, impact analysis on requirements, collecting information from web, etc. I have rebuilt the architecture of many legacy systems for refactoring

I believe, given your situation (being a dad), you should continue to introduce innovative applications of available technologies in the form of books, and perhaps video tutorials. Though, this may end up to consulting.

And, don't forget, things don't work in passive mode. You always need to do some light marketing. Even, it you want just to publish blogs. Good luck.