Re: Doubly unusable if he moved the document
I have gone (twice!) through the process of publishing a book.The first one was basically prose, in a scholarly setting (published by a university), the second one is a technical one. I chose to use LaTeX, the first one written straight in LaTeX, and the second one via Emacs in org-mode. And yes, the correction/edition process was painful. They want to use Word, I certainly don't. It was quite an issue to get them to accept to use red-ink over paper, and I had to incorporate it all... Painful, but OTOH way better than finding out the changes in Word and going back to my Sacred Originals.
Of course, teaching LaTeX to the editor is just out of the question!