I just watched the latest podcast from PhotoshopTV.com, where they mentioned about a photographer called George Lepp. And they mentioned some unobvious link on the Microsoft website - microsoft.com/prophoto. What could possible Microsoft offer to a photographer, right? Wrong. It appears this portion of the software giant's website offers very interesting articles. One of those is about basic tone and color in Photoshop - Photoshop CS2 Workflow, Chapter 5 (26 pages!). As you see it's Chapter #5 already. I tried to locate previous chapters, but no luck. Check out this website - there are more interesting stuff to read, but no archives.