\documentclass[11pt,a4paper]{book}
\usepackage{fontspec,kantlipsum,makeidx}
\setmainfont[
    Path           = /store/Fonts/,
    Extension      = .otf,
    Ligatures      = TeX,
    BoldFont       = Fontin-Bold,
    ItalicFont     = Fontin-Italic,
]{Fontin-Regular}
\bibliographystyle{plain}
\title{mk - a TeX/LaTeX maker}
\author{Wybo Dekker}
\makeindex

\begin{document}
\maketitle
\tableofcontents
\chapter{Introduction}
This document is a test for \texttt{mk}, the TeX/LaTeX maker.
For more information about TeX, see~\cite{texbook}.

\section{Kant 1}\index{Kant}
\kant[1] See~\cite{gracom}

\section{Kant 2}\index{Kant bold}
{\bfseries \kant[2]}

\section{Kant 3}\index{Kant italic}
{\itshape \kant[3]}

\bibliography{example}
\printindex
\end{document}