diff --git a/latex/book/book.tex b/latex/book/book.tex
index 73a3802..41b0c36 100644
--- a/latex/book/book.tex
+++ b/latex/book/book.tex
@@ -7,31 +7,54 @@
 \usepackage[T1]{fontenc} % encoding
 \renewcommand{\familydefault}{\sfdefault} % sans-serif font
 
-\usepackage[french]{babel} % langages
+% Langages
+\usepackage[french]{babel}
 \frenchsetup{SmallCapsFigTabCaptions=false}
 
+% Add \extra info to title
+\makeatletter
+\providecommand{\extra}[1]{
+  \apptocmd{\@author}{
+    \end{tabular}
+    \par\vspace*{0.7em}
+    \begin{tabular}[t]{c}
+    #1}{}{}
+}
+\makeatother
+
+% Change page dimensions
+% \usepackage[
+%   a4paper,
+%   left=20mm,
+%   top=20mm,
+% ]{geometry}
+
 % Bibliography
 \bibliographystyle{unsrt}
 \nocite{*}
 
-% Metadata
-\def\docTitle{Title}
-\def\docAuthor{Author}
+% Metadatas
+\def\docTitle{TITLE}
+\def\docAuthor{YOU}
+\def\authorMail{mailto:place@holder.com}
+\def\docSubject{SUBJECT}
+\def\docLocation{LOCATION}
 
 % Dependencies
 \usepackage[
   pdfauthor={\docAuthor},
   pdftitle={\docTitle},
+  pdfsubject={\docSubject}, % subject metadata
   hidelinks,
 ]{hyperref}
 
 
 \title{\docTitle}
 \author{\docAuthor}
+\extra{\docSubject~$\cdot$ \docLocation}
 \date{}
 
 \begin{document}
-
 \maketitle
 \flushbottom
 \tableofcontents
diff --git a/latex/book/sections/section1.tex b/latex/book/sections/section1.tex
index c8f1bba..b478586 100644
--- a/latex/book/sections/section1.tex
+++ b/latex/book/sections/section1.tex
@@ -1,5 +1,9 @@
 \documentclass[class=article]{standalone}
 
+% Code integration
+% \usepackage{minted}
+% \usemintedstyle{emacs}
+
 \begin{document}
 
 Here is the first section.
diff --git a/latex/book/sections/section2.tex b/latex/book/sections/section2.tex
index 98c05e2..3d0e73b 100644
--- a/latex/book/sections/section2.tex
+++ b/latex/book/sections/section2.tex
@@ -1,5 +1,9 @@
 \documentclass[class=article]{standalone}
 
+% Code integration
+% \usepackage{minted}
+% \usemintedstyle{emacs}
+
 \begin{document}
 
 Here is the second section.
diff --git a/latex/book/sections/section3.tex b/latex/book/sections/section3.tex
index fa956db..8fd1b24 100644
--- a/latex/book/sections/section3.tex
+++ b/latex/book/sections/section3.tex
@@ -1,5 +1,9 @@
 \documentclass[class=article]{standalone}
 
+% Code integration
+% \usepackage{minted}
+% \usemintedstyle{emacs}
+
 \begin{document}
 
 Here is the third section.
diff --git a/latex/document/document.tex b/latex/document/document.tex
index 0e6e5fb..d194afc 100644
--- a/latex/document/document.tex
+++ b/latex/document/document.tex
@@ -4,7 +4,8 @@
 \usepackage[T1]{fontenc} % encoding
 \renewcommand{\familydefault}{\sfdefault} % sans-serif font
 
-\usepackage[french]{babel} % langages
+% Langages
+\usepackage[french]{babel}
 \frenchsetup{SmallCapsFigTabCaptions=false}
 
 % Add \extra info to title
@@ -18,31 +19,34 @@
 }
 \makeatother
 
-% \usepackage[ % change page dimensions
+% Change page dimensions
+% \usepackage[
 %   a4paper,
 %   left=20mm,
 %   top=20mm,
 % ]{geometry}
 
-% \usepackage{minted} % code integration
+% Code integration
+% \usepackage{minted}
 % \usemintedstyle{emacs}
 
-\newcommand{\mytitle}{TITLE}
-\newcommand{\myauthor}{YOU}
-\newcommand{\mysubject}{SUBJECT}
-\newcommand{\mylocation}{LOCATION}
-\newcommand{\mymail}{mailto:place@holder.com}
+% Metadatas
+\def\docTitle{TITLE}
+\def\docAuthor{YOU}
+\def\authorMail{mailto:place@holder.com}
+\def\docSubject{SUBJECT}
+\def\docLocation{LOCATION}
 
 \usepackage[
-  pdfauthor={\myauthor},   % author  metadata
-  pdftitle={\mytitle},     % title   metadata
-  pdfsubject={\mysubject}, % subject metadata
-  hidelinks,               % clickable links in table of contents
+  pdfauthor={\docAuthor},   % author  metadata
+  pdftitle={\docTitle},     % title   metadata
+  pdfsubject={\docSubject}, % subject metadata
+  hidelinks,                % clickable links in table of contents
 ]{hyperref}
 
-\title{\mytitle}
-\author{\href{\mymail}{\myauthor}}
-\extra{\mysubject~$\cdot$ \mylocation}
+\title{\docTitle}
+\author{\href{\authorMail}{\docAuthor}}
+\extra{\docSubject~$\cdot$ \docLocation}
 \date{}
 
 \begin{document}