\documentclass{book}
%\usepackage{titletoc}
%\usepackage{hyperref}
\usepackage[a5paper]{geometry}
\usepackage{graphicx}
\usepackage{xcolor}
\usepackage[singlespacing]{setspace}

\begin{document}

% ***********
% front cover
% ***********

\thispagestyle{empty}
\input{frontcover}

% ***************
% title & authors
% ***************

\cleardoublepage
\pagenumbering{roman}
\begin{titlepage}
\pagecolor{blue}
\begin{center}
{
   \large
   \vspace*{2cm}
   { \Huge\textcolor{white}{\bf{Kolibri Manual}} }\\
   \vspace{\fill}
   {
      \doublespacing
      \textcolor{white}
      {
         Nils Eilers \\
         Christian Forstreuter \\
         Edilbert Kirk \\
         Thomas Winkler \\
      }
   }
}
\end{center}
\end{titlepage}
\pagecolor{white}


\input{bios}
\input{memorymap}
\input{monitor}
\end{document}
