TextControls Contains files whose names also are 0.tex, 1.tex, 2.tex, ..., n.tex, and which are all copies of:
% !TEX TS-program = pdflatexmk
\documentclass[11pt]{book}
\usepackage{../StyleSheets/Preamble}
\usepackage{../StyleSheets/GraphicsPaths}
\begin{document}
\addtocounter{chapter}{\jobbame-1}%Automatically numbers the chapter from the file name.
\addtocounter{page}{0}%To adjust the first page number, for instance to fit to the WholeBook
\include{../Contents/\jobname}%Text of Chapter i
\printindex
\end{document}
plus the file ALL.tex which puts together all uncommented chapters in TextContents/ALL.tex:
\documentclass[11pt]{book}
\usepackage{../StyleSheets/Preamble}
\usepackage{../StyleSheets/GraphicsPaths}
\begin{document}
\frontmatter
\include{../TextContents/1}
\include{../TextContents/2}
...
\include{../TextContents/n}
\end{document}