This repo shows simple structure for a large text, maybe for a novel, I think. You can typesetting txt files on Word, Write or gedit (using Debian here), and then copy-paste in tex files. Run ConTeXt using:
context master-file
That produces master-file.pdf, but, if you want to change line spacing on footnote, I mean more line spacing in main text and less line spacing in footnotes: change line spacing on footnote independent of main text, not works on this structure (Run on environment for project?Perhaps manually?). If you found the esoteric trick, give us a hand.
Tip A compromise solution is set up the line spacing on footnote at the end of each chapter.
Obviously, you don't need an Appendix file, is only a sugestion: a novel by parts what each Part contents x number of chapters (each Chapter is a tex file). I prefer Parts rather than a long file.
ToDo: change line spacing on footnote by page.
Wiki ConTeXt powerful tool for LuaTeX (made in German).
Script for Roboto Font Family was wrote by Henning Hraban Ramm.
Text for example Lorem Ipsum.