I just discovered the existence of this book this evening and as soon as I did I ordered a copy. It promises to be the definitive account of the making of the first Alien movie with lots of previously unseen photos and pre-production art.
It also includes ten 'arifacts' such as a Nostromo blueprint and sticker, storyboard art, Giger illustrations and an example of a page from the script.
I don't know how news about this escaped me. I look forward to it. All other priorities rescinded.