# Create unnumbered Chapters

I want to have chapters in my book that have no number. This means it doesn't show up on the TOC and it also becomes a prefix before a section. It would look like this:

EDIT: the it refers to the number. So I want no chapter number but I do want the chapter title to show up on the TOC. The image is of the TOC.

• So you're okay with it not showing in the ToC, or you want them added to the ToC as well? – Werner Apr 3 '18 at 17:32

Use \chapter* (which won't be put into the ToC) instead of \chapter and change the \section numbering to not include a number based on \chapter .

\documentclass{book}
\makeatletter
\renewcommand*{\thesection}{\@arabic\c@section}
\makeatother
\begin{document}
\tableofcontents
\chapter*{Vay}
\section{one}
\subsection{subsection}
\section{two}
\chapter*{Woohoo}
\section{three}
\subsection{subsection}
\end{document}


EDIT:

The above solved what I thought was the OP's problem but then the OP clarified the question.

\documentclass{book}
\usepackage{chngcntr}
\counterwithout{section}{chapter} % don't reset section numbers by chapter
\begin{document}
\tableofcontents
\chapter{Vay}
\section{one}
\subsection{subsection}
\section{two}
\chapter{Woohoo}
\section{three}
\subsection{subsection}
\end{document}


The above will produce unnumbered \chapter's in the ToC and body of the document with \section and below numbered continuously.

• I was unclear in my first version, so I edited it. Could you pease look again? – Fientje Vermeulen Apr 4 '18 at 1:18
• @FientjeVermeulen I have edited my answer following your clarified question. If you have any more clarifications please ask them in a new question. – Peter Wilson Apr 5 '18 at 19:12

A quick way to do this is to redefine the format of the chapter counter is displayed, with the next code.

\renewcommand{\thechapter}{}

• I was unclear the first time. I edited my question – Fientje Vermeulen Apr 3 '18 at 19:05