principal.tex

\documentclass[11pt, twoside]{book}
\input{prefix}  % Place all packages and function definitions in the prefix file

\begin{document}
% Do not add page numbers
\pagenumbering{gobble}
\input{chapters/00_title_page/title_page}

\tableofcontents
    % Start page number on abstract
    \cleardoublepage
    \pagenumbering{arabic}
    \pagestyle{plain}
    \input{chapters/01_abstract/abstract}
    \input{chapters/02_introduction/introduction}
    \input{chapters/03_objectives/objectives}
    \input{chapters/04_materials_and_methods/materials_and_methods}
    \input{chapters/05_results/results}
    \input{chapters/06_discussion/discussion}
    \input{chapters/07_conclusions/conclusions}
    % Stop page number after last numbered chapter
    \cleardoublepage
    \pagenumbering{gobble}
    \input{chapters/08_references/references}
    \input{chapters/90_appendix_i/appendix_i}
    \input{chapters/91_appendix_ii/appendix_ii}

\end{document}