\documentclass[spinewidth=25mm,coverwidth=15cm,coverheight=20cm,flapwidth=6cm]{bookcover}

\newbookcovercomponenttype{center rotate}{
    \parbox[t][\partheight][c]{\partwidth}{
        \begin{center}
            \rotatebox[origin=c]{90}{#1}
        \end{center}}}

\usepackage[outline]{contour}% It doesn't work with xelatex and lualatex
\contourlength{1pt}
\definecolor{lightbrown}{RGB}{176,88,0}
\colorlet{title}{yellow!60!black}
\usepackage[latin]{babel}
\usepackage{lipsum}

\begin{document}

\begin{bookcover}

% Remark
\begin{bookcoverelement}{center}{above front}
    \textcolor{blue}{A DUST JACKET}
\end{bookcoverelement}

% Black background color on the whole cover
\begin{bookcoverelement}{color}{bg whole}
    black
\end{bookcoverelement}

% Brown background picture on the whole cover, without the flaps
\begin{bookcoverelement}{picture}{bg whole without flaps}
    ./figures/bg.jpg
\end{bookcoverelement}

% Vertical light brown transparent trails on the back cover by a tikz code
\begin{bookcoverelement}{tikz}{bg back}
    \fill[opacity=0.3,color=lightbrown] 
    (0mm,0mm) rectangle (20mm,210mm) (100mm,0mm) rectangle (150mm,210mm);
\end{bookcoverelement}

% Vertical light brown transparent trails on the front cover by a tikz code
\begin{bookcoverelement}{tikz}{bg front}
    \fill[opacity=0.3,color=lightbrown] 
    (0mm,0mm) rectangle (50mm,210mm) (130mm,0mm) rectangle (150mm,210mm);
\end{bookcoverelement}

% Picture on the front, behind the title
\begin{bookcoverelement}{normal}{front}
    \vspace{70mm}
    \centering
    \includegraphics[width=8cm]{./figures/cards.png}
\end{bookcoverelement}

% Text on the front cover
\begin{bookcoverelement}{normal}{front}
    \centering
    \vspace{60mm}
    \color{title}\sffamily\bfseries
    \resizebox*{50mm}{8mm}{\contour{black}{Rose Taylor}}
    \par\vspace{20mm}
    \resizebox*{90mm}{40mm}{\parbox{35mm}{
        \centering
        \contour{black}{PROBABILITY}\\
        \contour{black}{THEORY}\\}}
\end{bookcoverelement}

% Text on the spine
\begin{bookcoverelement}{center rotate}{spine}
    \contour{black}{%
        \color{title}\huge\sffamily\bfseries
        Rose Taylor -- Probability Theory}
\end{bookcoverelement}

% Text on the back cover
\begin{bookcoverelement}{normal}{back}
    \centering
    \vspace{20mm}
    \parbox{110mm}{\color{white}\lipsum[1]}
\end{bookcoverelement}

% Text and picture on the front flap
\begin{bookcoverelement}{normal}{front flap}
    \centering
    \vspace{20mm}
    \parbox{40mm}{\color{white}\lipsum[2]}
    \vfill
    \includegraphics[width=30mm]{./figures/dice.png}
    \vspace{10mm}
\end{bookcoverelement}

% Text on the back flap
\begin{bookcoverelement}{normal}{back flap}
    \centering
    \vspace{20mm}
    \parbox{40mm}{\color{white}\lipsum[2]}
\end{bookcoverelement}

\end{bookcover}

\end{document}