Speaking of (in the OP) “Skywalking”, that was the book (along with Rinzler’s ESB book) that really shaped my opinion of George as a talented guy who was the single person most responsible for the OT being what it was.
Before that I just assumed that people were being honest about all the “saved in editing by his wife”, “he wasn’t very involved in ESB compared to the other films”, etc.

There are those out there that want you to believe that Lucas is the Bob Kane of Star Wars.