%Packages
\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[ngerman]{babel}
\usepackage[style=authortitle,backend=bibtex,isbn=false]{biblatex}
\usepackage[babel,german=quotes]{csquotes}
\usepackage{fontspec}
\usepackage{geometry}
\usepackage{blindtext}

%Dokument Definition
\author{Valentin Boettcher}
\date{\today}
\title{Semi}
\geometry{a4paper, top=25mm, left=25mm, right=25mm, bottom=30mm,
headsep=10mm, footskip=12mm}
\setmainfont{Arial}
\bibliography{cool}

%Dokument
\begin{document}
%Title
\maketitle
\thispagestyle{empty}
\newpage

%Inhalt
\tableofcontents

%Dokument-Include
%Kapitel 1
\include{./Kapitel/01/10}
\include{./Kapitel/01/11}
\include{./Kapitel/01/111}
\include{./Kapitel/01/112}
\include{./Kapitel/01/113}
\include{./Kapitel/01/12}
%Kapitel 2
\include{./Kapitel/02/20}
\include{./Kapitel/02/21}
\include{./Kapitel/02/211}
\include{./Kapitel/02/22}
\include{./Kapitel/02/221}
\include{./Kapitel/02/222}
\include{./Kapitel/02/223}
\include{./Kapitel/02/23}
%Literatur
\setlength{\baselineskip}{2\baselineskip}
\printbibliography	
\end{document}