How to publish an [La]TeXified version of an old typewritten book in mathematics? I am considering to [La]TeXify an old typewritten book in mathematics. The book contains a lot of mathematical formulae and figures, but it was typed just before the [La]TeX age: its content is very interesting but it is very painful to read, very unfortunately.
Grossly I am thinking of hacking an OCR output to get a LaTeX version of the book: it would be a kind of update of the typing and/or a repackaging of the content. I am wondering whether there is any Journal or something where such work can be accepted.
Any hint is welcome.
This material is almost certainly under copyright, so the appropriate thing to do is to get in touch with the publisher and propose this project.  They may, in fact, be receptive and willing to work with you to make this an official new edition.  If they are not interested, then they may at least be willing to give you an official permission for your "remake."

If, on the other hand, the publisher is non-responsive or for some other reason cannot be contacted, then it would be reasonable to assume it's OK to go ahead with the remake and post it informally, e.g., on your personal website.  Because of the copyright issue, no third party is likely to want to publish it, and if the copyright holder eventually decides to take notice and that they don't like what you have done, you may have to take it down (there is, of course, a chance that they may sue instead, but that is relatively unlikely for such a document).  In the meantime, though, it would be a reasonable public service to provide for an apparently abandoned property.