Background: Im working on a rather long instructional book, and have just started trying to use LaTeX. The book doesn't have any scientific notation in it, and most of the diagrams I made in other software and rendered to still images. This will be the first thing I submit to publishers. It seems like LaTeX is most useful for writers who end up being in control of the distribution of their own work, I could be wrong though.
Question: Should a writer spend much time using LaTeX if ultimately handing the pack to a publisher? Will they even want a .tex file? Or will they want just a Word file or similar, to which they will apply their own styling to?
I will probably keep learning and using LaTeX because it seems to create very nice and neat work. But I'm more curious in regards to LaTeX and publishers.