Time for action – adding a dedication and an appendix

Our book shall begin with a dedication. The front matter shall consist of the table of contents, lists of tables and figures, and a dedication. All the pages of the front matter shall be numbered with Roman letters. Finally, we add an appendix providing supplementary proofs which we like to present outside the main chapters:

1. Create a file dedication.tex:

   \chapter{Dedication}
   This book is dedicated to one of the greatest mathematicians of
   all time: Carl Friedrich Gauss. Without him, this book wouldn't
   have been possible.

2. Create a file proofs.tex:

   \chapter{Proofs}
   ...

3. Extend the main file equation.tex by the highlighted lines:

   \documentclass{book}
   \input{preamble}
   \begin{document}
   \frontmatter
   \include{dedication}
   \tableofcontents
   \listoftables
   \listoffigures
   \mainmatter
   \include{chapter1}
   \include{chapter2}
   \backmatter
   \include{proofs}
   \nocite{*}
   \bibliographystyle{plainnat}
   \bibliography{tex}
   \end{document}

4. As you can see in the last highlighted...