Sample document for Exercise 3

% Let's write a book
\documentclass[11pt]{book}

% Start the text
\begin{document}

% Leave 5mm between each paragraph
\parskip 5mm

\chapter{Learning to Write LaTeX}
\section{Introduction}
Hello, this is my first attempt at writing in LaTeX.

\parindent 15pt % let's have a 15pt indentation
I'm hoping that once I've mastered LaTeX, everyone will be so in awe
of my beautiful papers that they'll publish them straight away without
all that boring nonsense with referees.

\parindent 1.2in % no, let's make it 1.2in
I should probably work out how much I want to indent my paragraphs by.

\section{Conclusion}
I haven't written very much yet but I think I'm starting to get the
hang of it.
\end{document}