FYI A self-published book about editing Star Wars seems to be free to download at the moment. You may or may not find it mildly interesting. I read it a few months ago (as part of Kindle Unlimited so it was semi-‘free’) and thought it harmless if a little pointless.
The Editing of Star Wars: How Cutting Created a Classic by Linton Davies
https://www.amazon.co.uk/Editing-Star-Wars-Cutting-Created-ebook/dp/B007WRHXDQ/ref=cm_cr-mr-title
