This book cover template is written with the bookcover LaTeX document class.
\begin
Opdag hvorfor 18 millioner mennesker verden rundt stoler på Overleaf med deres arbejde.
% User guide: http://mirrors.ctan.org/macros/latex/contrib/bookcover/bookcover.pdf
\documentclass[
coverwidth=15cm,
coverheight=20cm,
spinewidth=25mm,
flapwidth=6cm,
wrapwidth=5mm,
% trimmed % Show only trimmed part!
]{bookcover}
%\bookcovertrimmedpart{front} % Trimmed part is the front cover
%\bookcovertrimmedpart{back} % Trimmed part is the back cover
%\bookcovertrimmedpart{spine} % Trimmed part is the spine
\newbookcovercomponenttype{center rotate}{
\vfill
\centering
\rotatebox[origin=c]{-90}{#1}
\vfill}
\usepackage[outline]{contour}% It doesn't work with xelatex and lualatex
\contourlength{1pt}
\usepackage[english]{babel}
\usepackage{kantlipsum,microtype}
\begin{document}
\begin{bookcover}
% Remark
\begin{bookcoverelement}{center}{above front}
\textcolor{blue}{A dust jacket example}
\end{bookcoverelement}
% Background color on the whole cover
\begin{bookcoverelement}{color}{bg whole}
black
\end{bookcoverelement}
% Background picture on the whole cover without flaps
\begin{bookcoverelement}{picture}{bg whole without flaps}
./figures/bookcover-bg.jpg
\end{bookcoverelement}
% Transparent areas on the back cover
\begin{bookcoverelement}{tikz}{bg back and wrap}
\fill[opacity=0.3,black!50]
(0,0) rectangle (25mm,\partheight)
(part.north east) rectangle ([xshift=-5cm]part.south east);
\end{bookcoverelement}
% Transparent areas on the front cover
\begin{bookcoverelement}{tikz}{bg front and wrap}
\fill[opacity=0.3,black!50]
(0,0) rectangle (50mm,\partheight)
(part.north east) rectangle ([xshift=-25mm]part.south east);
\end{bookcoverelement}
% Picture on the front cover behind the title
\begin{bookcoverelement}{center}{front}
\includegraphics{./figures/bookcover-cards.pdf}
\end{bookcoverelement}
% Author and title on the front cover
\begin{bookcoverelement}{normal}{front}[,,,5cm]
\centering
\color{yellow!60!black}\sffamily\bfseries
\resizebox{!}{5mm}{\contour{black}{Rose Taylor}}\\[26mm]
\resizebox{!}{7mm}{\contour{black}{GAMBLING SYSTEMS}}\\[8mm]
\resizebox{!}{7mm}{\contour{black}{AND STRATEGIES}}\\
\end{bookcoverelement}
% Title on the spine
\begin{bookcoverelement}{center rotate}{spine}
\color{yellow!60!black}\huge\sffamily\bfseries
\contour{black}{Rose Taylor -- Gambling Systems and Strategies}
\end{bookcoverelement}
% Text on the back cover
\begin{bookcoverelement}{normal}{back}[2cm,2cm,2cm,2cm]
\color{white}\kant[1]
\end{bookcoverelement}
% Text and picture on the front flap
\begin{bookcoverelement}{normal}{front flap}[1cm,1cm,1cm,2cm]
\color{white}\kant[2]
\vfill
{\centering\includegraphics{./figures/bookcover-dice.pdf}\par}
\end{bookcoverelement}
% Text on the back flap
\begin{bookcoverelement}{normal}{back flap}[1cm,2cm,1cm,2cm]
\color{white}\kant[3]
\end{bookcoverelement}
\end{bookcover}
\end{document}