-\documentclass[10pt]{book}
+\documentclass[twoside,10pt]{book}
\input{preamble}
\begin{document}
\frontmatter{}
+%\addtitlethumb{Frontmatter}{}{white}{gray}{pagesLTS.0}
%Titlepage
\input{titlepage}
\glsresetall{}
% The actual document
-\mainmatter{}
+\mainmatter%
+\addthumb{Chapters}{\arabic{chapter}}{white}{gray}
\chapter{Example}%
\label{chp:example}
% Start appendix
\appendix%
\label{chp:appendix}
+\addthumb{Appendices}{\Alph{chapter}}{white}{gray}
+
\chapter{An Appendix}%
\label{chp:an_appendix}
-\input{an_appendix.tex}
+\input{an_appendix}
\backmatter%
+\stopthumb% chktex 9
+
% Bibliography
\phantomsection{}%
\label{chp:bibliography}
\label{chp:index}
\printindex
-\end{document}
+\end{document} % chktex 10