Also see my reply in the other thread. Self-publish opportunities abound, but that still means that putting together a book that's worth the ink or pixels is a great deal of work, even ones that start in electronic forms. And you would want to contact the family first before trying to publish it.
The other option, of course, is that you have a unique object that can go in an honored place on your bookshelf for you to enjoy and learn from, which is a perfectly fine thing.