The Dragon is a great opening for club players when you get to play Dragons.  Unfortunately, 2...d6 isn't the ideal move against the 50% of club players who play moves other than 2 Nf3 and 3 d4.

This is a major reason I switched from 2...d6 Sicilians to the Taimanov years ago.  Too many people playing lines where ...d6 wasn't a move I needed very badly.

That said, the Yugoslav Attack is one of the most fascinating lines in this game, and every other line against the Dragon is just fine for Black; the active development of the bishop really only has the one drawback, and that's the possibility of h2-h4-h5xg6.

There was also an AD book by Hansen and Nielsen.

If the move by move book is still coming out, i would guess it would be on the Accelerated Dragon...hasnt Hansen written a book on that before (with Donaldsen?)

I don not remember exactly all parts but as I recall it that book was a must to keep up in the critical lines but did not have a compete coverage of every line.

For my part it looks a bit illogical to write a Move by Move book with such a theory demanding opening but I will definitely buy this book.

Speaking of intro book, there was a book that I actually liked that was called "Secrets of the Sicilian Dragon" by Gufeld and Schiller.
Generally I dont like any of these authors book but that book was actually good, it was a excellent idea book. Time passed and Gufeld died and Schiller realized a 2nd edition. However that book did not cover new thematical ideas and new lines that had been develop the decade (at least) between them and he had replaced some parts of the book but not done anything to the ideas and thematical parts.

No idea. But from my database, Carsten Hansen hasn't played a Dragon game since the early 90's. 

I would prefer Nielsen's by far - he's a top-tier player who's played the Dragon in some pretty high-profile games. His wife, Victoria Cmilyte, is a well-known Dragon expert as well (iirc). I have the DVDs and like them a lot. Williams might be a more entertaining lecturer, but for something as theoretical as the Dragon, I'd rather have an expert. Nielsen is great too, as long as you can tolerate his overuse of the word, "well".

Thank you for the helpful comments.

The chess developments book is my main reference. As I like watching DVD's and it appears the ones on the Dragon are pretty good. What do you think is the best set of DVDs on the Dragon- Williams or Nielsen? The samples I have seen and the various comments I have seen on this forum suggest that both are good. Is Williams more inspirational and Nielsen provide more detail?