This weekend I managed to climb the steepest part of the learning curve with formatting a book using LaTeX.
Watch this space, as I should be able to complete and publish this proof of concept pretty quickly. If this book works out to be worth my time, you can expect quite a bit more publishing from me soon.
@JohnsNotHere Yes I already have a solid, formatted book with a single complete chapter in it as a proof of concept. It's now "just" a matter of adding the remaining chapters (already written) with formatting and indexing along the way, and picking some cover art.
Of course it's going a lot faster for me since I have already formatted numerous books using multiple publishers' own professional templates (ranging from XHTML, to web-based, to multiple Word templates) so I have that background.