This is good news. I have the first book and yes, this is in essence a second edition of the existing book. The First edition it was primised there would be a slew of "additional chapters" for download after it was published. I think he did release one or two. One was on the KIM. This edition adds acording to what I read, interviews with one of the Tramiel's and added information.
I tried ordering this when online bookstores first started listing it and had those cancelled as its date slipped and slipped. I thought for sure we'd never see it.
Great that it is, hopefully, close to our hands.