Dan has started a blog that highlights the technical thoughts behind some of the paintings from his recent book. There are two posts so far, and both have great insights and close-up imagery.
Hopefully Dan keeps this up, I would love to read more from him and start to create a personal resource of all of these posts for my library.
For Dan's Blog visit: http://danielgerhartz.wordpress.com/
If you like the idea of saving these (or any webpage) for yourself, you could use Joliprint to convert the pages into pdf's. It's what I use, and it generally does a pretty good job -- a whole lot easier then copying and pasting everything into word or something. I then print them off and stuff them in a folder or notebook. (this makes me feel very studious, like I'm in fifth grade cutting out news articles or something)