Which artbook is the most complete?

I have the digital collector’s edition which I pre-ordered about a year in advance before the game was out. There is an artbook. But how complete is it? In the last video update Daniel Vavra was speaking about a new artbook. Is it going to have more content than one that I have? How can I order it? Will it be available as a PDF or a hard-copy only?

Dan Vavra spoke of some big pictures. I assume each version is different. Just wait.