%%
%% The LaTeX Companion, 3ed
%%
%% Example 16-7-17 on page II-552 in "Printing the bibliography".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{261.0pt}

%  Use biber program
  \makeatletter
  \renewcommand\section{\@startsection{section}{1}{\z@}%
    {-1.25ex \@plus-1ex \@minus-.2ex}%
    {.5ex}%
    {\normalfont\normalsize\bfseries}}
  \makeatother

  \setlength\parindent{0pt}

%StartShownPreambleCommands
\usepackage[defernumbers]
           {biblatex}
\addbibresource{tlc-ex.bib}
\setlength\bibitemsep{0pt}
%StopShownPreambleCommands

\begin{document}
\textcite{article1},
\textcite{article2},
\textcite{book1},
\textcite{book2}
\printbibliography
  [type=book,title=Books]

\printbibliography
  [nottype=book,title=Not Books]
\end{document}
