I have it. It’s huge! I mean physically: the book is very large and heavy. I haven’t got the time to read it yet, I just took a quick look: there’s a few seldom seen pictures, like pre-production art from Colin Cantwell.
Unfortunately, all the actual frame grabs from the movies are from the special editions. For example, there’s behind the scenes photos of how they originally made the emperor in ESB, and on the same page the frame from the movie show Ian McDarmid from the SE. This is ridiculous! At least it’s acknowledged in the legends of the frame grabs that they are from the SE.