The solution depends on the document class.
article Add the following lines to the preamble:
\usepackage{xpatch}
\makeatletter
\newcommand\removebibheader
{\xpatchcmd\std@thebibliography
{\section*{\refname}%
\@mkboth{\MakeUppercase\refname}{\MakeUppercase\refname}%
}{}{}{}%
}
\makeatother
scrartcl, scrreprt, scrbook Add the following lines to the preamble:
\makeatletter
\newcommand\removebibheader{\let\bib@heading\relax}
\makeatother
Moreover, for all of the above classes: Define the new bibliography with whatever title you like, e.g.
\newcites{novels}{Novels}
At the place where you include the bibliography, execute the command \removebibheader before. In order not to affect other bibliographies, surround it and the \bibliograhy... command by braces.
{\removebibheader
\bibliographynovels{novels}
}
Here is an example with full code.

\documentclass{article}
\usepackage{multibib}
\newcites{novels}{Novels}
\usepackage{xpatch}
\makeatletter
\newcommand\removebibheader
{\xpatchcmd\std@thebibliography
{\section*{\refname}%
\@mkboth{\MakeUppercase\refname}{\MakeUppercase\refname}%
}{}{}{}%
}
\makeatother
\usepackage{blindtext}
\begin{document}
\citenovels{entry}
\blindtext
\bibliographystylenovels{plain}
{\removebibheader
\bibliographynovels{novels}
}
\end{document}
Alternatively, for the scrartcl class:
\documentclass{scrartcl}
\usepackage{multibib}
\newcites{novels}{Novels}
\makeatletter
\newcommand\removebibheader{\let\bib@heading\relax}
\makeatother
\usepackage{blindtext}
\begin{document}
\citenovels{entry}
\blindtext
\bibliographystylenovels{plain}
{\removebibheader
\bibliographynovels{novels}
}
\end{document}
Contents of novels.bib:
@article{entry,
author = {The author},
title = {The novel},
journal = {The journal},
year=2016
}
scrartclclass. – gernot Dec 14 '16 at 22:28