I have one document that combines many documents: Pathoanatomy and Pathophysiology, for instance. I want to start a new document from the body like
\documentclass{article}
\begin{document}
\title{Introduction to Pathoanatomy Notes}
\begin{titlepage}
\maketitle
\end{titlepage}
% first document
...
% second document in the some body
\title{Introduction to Pathophysiology Notes}
\begin{titlepage}
\maketitle
\end{titlepage}
...
\end{document}
The output is the right but the style does not remain.
How can you do the same but maintain the style of the title page to the second title?