Opacity effect for the backcover
The following is a tcolorbox solution which allows to set the required margins directly. I marked the options inside the code:
\documentclass[10pt]{standalone}
\usepackage[skins]{tcolorbox}
\usepackage{mathrsfs}
\usetikzlibrary{arrows}
\pagestyle{empty}
\begin{document}
\thispagestyle{empty}%
\begin{tcolorbox}[
enhanced,size=minimal,sharp corners,
text fill, % only, if \vfill is to be used
width = 210mm, % paper width
height = 297mm, % paper height
leftrule = 20mm, % outer margin
rightrule = 20mm, % outer margin
toprule = 25mm, % outer margin
bottomrule = 25mm, % outer margin
left = 15mm, % inner margin
right = 15mm, % inner margin
top = 20mm, % inner margin
bottom = 20mm, % inner margin
frame style = {fill overzoom image=goldshade.png}, % background image
opacityback = 0.5, % transparency
colback = cyan!22,
]
\textcopyright{} 2009 $-$ 2018 David Nguyen \\
All rights reserved.
This work is not to be distributed and/or modified without licensse.
This content has been tailored by the author over his years of training the best mathematical minds. Problems in the booklet provides a wide array of mathematics flavours, enhance problem solving and thinking ways for young learners.
\vfill
\begin{center}
99 32 11 88 48 01\hspace{2em}9 9 8 6 5 4 %1
\end{center}
\begin{center}
\begin{tabular}{ll}
First edition: & May 2010 \\
Second impression, with minor extensions & January 2011 \\
Third impression, with minor extensions & May 2016
\end{tabular}
\end{center}
Institute of Mathematics\\
Vietnam
\end{tcolorbox}
\end{document}
Update:
The original question used the standalone class. With some small modifications, you can get the same thing as page using a class like article.
The following example also contains
frame style = {fill plain image*={scale=3}{goldshade.png}}
to show the inclusion of a background image with arbitraty scaling as the OP asked for in comments.
\documentclass[10pt]{article}
\usepackage[skins,breakable]{tcolorbox}
\usepackage{mathrsfs,lipsum}
\usetikzlibrary{arrows}
\begin{document}
\lipsum[1-20]
\begin{tcolorbox}[
enhanced,size=minimal,sharp corners,
spread,
phantom=\thispagestyle{empty},
text fill, % only, if \vfill is to be used
leftrule = 20mm, % outer margin
rightrule = 20mm, % outer margin
toprule = 25mm, % outer margin
bottomrule = 25mm, % outer margin
left = 15mm, % inner margin
right = 15mm, % inner margin
top = 20mm, % inner margin
bottom = 20mm, % inner margin
frame style = {fill plain image*={scale=3}{goldshade.png}}, % background image
opacityback = 0.5, % transparency
colback = cyan!22,
]
%
\textcopyright{} 2009 $-$ 2018 David Nguyen \\
All rights reserved.
This work is not to be distributed and/or modified without licensse.
This content has been tailored by the author over his years of training the best mathematical minds. Problems in the booklet provides a wide array of mathematics flavours, enhance problem solving and thinking ways for young learners.
\vfill
\begin{center}
99 32 11 88 48 01\hspace{2em}9 9 8 6 5 4 %1
\end{center}
\begin{center}
\begin{tabular}{ll}
First edition: & May 2010 \\
Second impression, with minor extensions & January 2011 \\
Third impression, with minor extensions & May 2016
\end{tabular}
\end{center}
Institute of Mathematics\\
Vietnam
\end{tcolorbox}
\end{document}
You can apply an opacity= to the text:
Code:
\documentclass[10pt]{article}
\usepackage{graphicx}
\usepackage{pgf,tikz}
\usepackage{mathrsfs}
\usetikzlibrary{arrows}
\usepackage{showframe}
\pagestyle{empty}
\begin{document}
\noindent
\begin{tikzpicture}
\node[anchor=south,inner sep=0] (A) at (0,0)
{\includegraphics[width=\linewidth]{../images/EiffelWide.jpg}};
\node[text width=10cm,align=left, anchor=south, text opacity=0.9,
shift={(0.0cm,0.75cm)}
] at (0,0)
{\noindent\fcolorbox{black}{cyan!22}{%
\begin{minipage}{10.0cm}
\thispagestyle{empty}
\textcopyright{} 2009 $-$ 2018 David Nguyen
All rights reserved.
This work is not to be distributed and/or modified without licensee.
This content has been tailored by the author over his years of training the best mathematical minds. Problems in the booklet provides a wide array of mathematics flavours, enhance problem solving and thinking ways for young learners.
\begin{center}
99 32 11 88 48 01\hspace{2em}9 9 8 6 5 4 %1
\end{center}
\begin{center}
\begin{tabular}{ll}
First edition: & May 2010 \\
Second impression, with minor extensions & January 2011 \\
Third impression, with minor extensions & May 2016
\end{tabular}
\end{center}
Institute of Mathematics
Vietnam
\end{minipage}}};
\end{tikzpicture}%
\end{document}
Very similar to Peter Grill's nice answer, just with fill opacity. The tcolorbox will inherit the fill opacity of the node.
\documentclass[10pt]{standalone}
\usepackage{pgf,tikz}
\usepackage{mathrsfs}
\usetikzlibrary{arrows}
\pagestyle{empty}
\begin{document}
\thispagestyle{empty}
\begin{tikzpicture}
\node[rotate=90] {\includegraphics[scale=1.5]{example-image-a}};
\node[text width=12cm,align=left,fill opacity=0.7] {\noindent\fcolorbox{black}{cyan!22}{%
\begin{minipage}{\dimexpr1.00733\textwidth-2\fboxrule-2\fboxsep\relax}
\vspace*{4cm}
\textcopyright{} 2009 $-$ 2018 David Nguyen \\
All rights reserved.
This work is not to be distributed and/or modified without licensse.
This content has been tailored by the author over his years of training the best mathematical minds. Problems in the booklet provides a wide array of mathematics flavours, enhance problem solving and thinking ways for young learners.
\begin{center}
99 32 11 88 48 01\hspace{2em}9 9 8 6 5 4 %1
\end{center}
\begin{center}
\begin{tabular}{ll}
First edition: & May 2010 \\
Second impression, with minor extensions & January 2011 \\
Third impression, with minor extensions & May 2016
\end{tabular}
\end{center}
Institute of Mathematics\\
Vietnam \\
\vspace*{4cm}
\end{minipage}}};
\end{tikzpicture}
\end{document}
