I actually think one would be better off with two or three books: one on typography/graphical design for beginners, one on accessibility, and a book like Eric Meyers - it serves it's purpose because of the techniques, not because of Eric's visual design skills, but because of his CSS skills.

I'm believe that a book that tries to cover both subjects has the potential of actually confusing the readers.

I came from that perspective. Then I realized what CSS can actually do. And I started noticing that I was one of few noticing, at least when compared to other designers.

So there is a hole that needed filling. Hopefully the Zen Garden is the first shovel-full, and once the designers catch on and pitch in a shovel or two themselves the ideas will start flowing, and someone along the way will write a book.

So that was the long answer. The short answer is: cause the people who should be writing it aren't using CSS yet.

No promises on time, but my next Zen Garden design will include a case study on how I went from Photoshop to CSS. Stay tuned.

Maybe it is time to fully recognise that web design and implemention are different skill sets,
and maybe we could then get CSS books, (and XML books) that talk to each discipline.