As stated, hyperref doesn't produce in the bookmarks titlepage nor table of contents. To be more specific, I have a 8 chapters, with over 50 sections, and lots of cross-references. ALL of that is produced perfectly and flawlessly. But when the final PDF is compiled the bookmarks start at PREFACE and not at TABLE OF CONTENTS or TITLE PAGE as I wish they did.
\documentclass[leqno, letterpaper, 10 pt]{book}
\usepackage{hyperref}
\hypersetup{
pdftitle={Fundamentos de C\'alculo},
pdfsubject={C\'alculo diferencial},
bookmarksnumbered=true,
bookmarksopen=true,
bookmarksopenlevel=1,
colorlinks=true,
citecolor=black,
filecolor=black,
linkcolor=black,
urlcolor=black,
pdfstartview=Fit,
pdfpagemode=UseOutlines,
pdfpagelayout=TwoPageRight
}
\begin{document}
\frontmatter
\begin{titlepage}
\centering
{\scshape \huge Fundamentos de c\'{a}lculo. \par}
\vspace{1cm}
{\scshape \large \textsc{Parte I. Preliminares del c\'{a}lculo.} \par}
{\scshape Capítulos del 1 al 4. \par}
{\scshape \large \textsc{Parte II. Desarrollo del c\'{a}lculo diferencial.} \par}
{\scshape Capítulos del 5 al 8. \par}
\vspace{2cm}
\vfill
{\large Mayo de 2018. \par}
\rule{4cm}{0.4pt}
\end{titlepage}
\tableofcontents
\end{document}

