Thanks for thanking, the prospect (let me have some hopes up for this proposed new feature - your team might decide against it eventually, haha) and your attention @Peter, @Arnoud, @Karl, appreciated ymmd!
Good luck everyone! I am continuing now with writing my solutions manual (maths workbook), using @Paul's wonderful/effective "epm-template". I have written "over 500 pages" (hard to say exactly because the Print Preview keeps crashing the Mathematica application at around page count 270 and i'll investigate this issue in distant future). A really fun project. My workbook doesn't look as neat as a book written by a LaTeX aficionado but I couldn't imagine that a LaTeX author can compose more productively than how I've been typing and solving problems.
On an interesting side note, maybe the most infamous LaTeX-set solutions manual author is John Weatherwax. He wrote like hundreds of semi-finished workbooks, all typeset in LaTeX and afaik none including code (in Python, R, Maple, Mathematica, Matlab, or alike).
Hopefully Wolfram can offer a fully developed *solutions book/workbook .nb-template** file in future, very similar to Paul Wellin's one. In the meantime I'll try to pick up a bit on notebook programming.
