I am using the memoir class. I am curious whether I am misunderstanding something from the manual. I am trying to create a book where a \part(...) command does not force a new page immediately after the title. I want to add text on the same page (basically a description or abstract). I thought I could use this
\renewcommand{\afterpartskip}{\relax}
Unfortunately, the command \part{...} still forces a new page. So, I instead created this
\newenvironment{BookPart}[1]
{%
\phantomsection{}
\addcontentsline{toc}{part}{#1}
\stepcounter{part}
\noindent{\sffamily\Huge\color{blue}Part~\thepart: #1}
\vspace*{2\baselineskip}
}
{%
\clearpage
}
A base example then is as follows:
\begin{BookPart}{Introduction}
\noindent{}This portion of the book introduces you to ...
\end{BookPart}
Absent that I would re-write primitives behind \part{...}, is this a reasonable approach? Otherwise, does this misunderstanding point to a need for clarification in the document for memoir that \part{...} always enforces a new page break regardless of how one tries to override it using \afterpartskip{...}?

https://tex.stackexchange.com/questions/246177/how-can-i-remove-the-blank-page-after-the-main-title-appendix
– Jeffrey J Weimer Jul 07 '18 at 13:28\newcommand*{\afterbookskip}{\vfil\newpage}almost literally as saying that\afterbookskiphandles the page break entirely unto itself. I see now, the default is actually equivalent to something like\newcommand*{\afterbookskip}{\vfil\stateofpartblankpage{}}, where the state of\partblankpageor\nopartblankpageis checked to decide whether to issue a\newpageor not. – Jeffrey J Weimer Jul 10 '18 at 16:04