fishmanlee said:

Ludwig
the book's author J.W. Rinzler quotes Lucas saying....

Honestly, what hasn't Lucas been quoted saying? Dude has told so many fucking truths and facts about the history of the franchise that it's impossible to make sense of them all. 1 film, 3 films, 6 films, 9 films, 12 films, brother\sister, not related, thought it up on the fly, Original Vision, adventures of Luke, tragedy of Vader, shot first, shot second, etc, etc, etc, etc, ad nauseam.

To paraphrase from Apocalypse Now; With Lucas, the bullshit piles up so fast, you need wings to stay above it.

I've said it before, I'll say it again; When he gives an interview, Lucas should just burp the alphabet.