\documentclass[11pt]{book}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{makeidx}
\usepackage{graphicx}
\usepackage{tabularx}
\usepackage{makeidx}


\author{B. Burwell and A. Morash}
\title{MPX--OS User Manual}
\date{Fall 2013}
\makeindex



\begin{document}

\maketitle

\frontmatter
\tableofcontents

\mainmatter
\include{overview_of_comhan}
\include{summary_of_commands}
\include{description_of_commands}
\include{summary_of_errors}

\printindex

\backmatter


\end{document}