Force text between part and chapter to be on the next page after the part title

Question

I have not found a better title sorry.

I have a document (book class) in which I have something like :

\part{MyPart}

The brief introduction of my part, where I present the three chapters I will have

\chapter{First Chapter}

As the introduction of my part is very short, I find it too much to loose too many pages. For now it is a structure of

• Page 1 : Part Name
• Page 2 : Blank
• Page 3 : Brief Introduction of my part
• Page 4 : Blank
• Page 5 : Chapter title and beginngin of my chapter

How do I skip some blank pages and get :

• Part 1 : Part name
• Page 2 : Brief introduction
• Page 3 : Chapter title and beginning of my chapter ?

Answer 1

You can define your own environment and modify \@endpart so it doesn't produce a blank page; I also provide a \nopartintro in case one of them has no introduction.

\documentclass{book}

\usepackage{lipsum}

\makeatletter
\renewcommand{\@endpart}{\vfil\newpage}
\makeatother
\newenvironment{partintro}
  {\vspace*{\fill}
   \section*{\centering Introduction to part \thepart}
   \begin{quotation}}
  {\end{quotation}\vspace*{\fill}\newpage}
\newcommand{\nopartintro}{%
  \vspace*{\fill}
  \thispagestyle{empty}
  \newpage
}

\begin{document}

\mainmatter

\part{First}

\begin{partintro}
This is the introduction to the part

\lipsum[2]
\end{partintro}

\chapter{First}

\lipsum

\end{document}

Customize partintro as you like

Answer 2

Just simplify \@endpart to force a page break but no more.

\documentclass{book}
\makeatletter
\let\@endpart\clearpage
\makeatother

\begin{document}
\part{MyPart}

The brief introduction of my part, where I present the three chapters I will have

\chapter{First Chapter}

aaa

\end{document}