documentclass{scrartcl}
usepackage{geometry}
geometry{
  a5paper
}
usepackage{blindtext}
%
pagestyle{empty}
begin{document}

{Large Front}
vspace*{4cm}

blindtext
end{document}

documentclass{scrartcl}
usepackage{geometry}
geometry{
  a5paper
}
usepackage{blindtext}
%
pagestyle{empty}
begin{document}

{Large Back}
vspace*{4cm}

blindtext
end{document}

documentclass[border=0pt]{standalone}
%
usepackage{pgfplots}
pgfplotsset{compat=1.9}
usetikzlibrary{patterns}
%
begin{document}
begin{tikzpicture}

node[rotate=90] (a1) at (0,0){Lorem ipsum};
node[rotate=90] (a1) at (-0.2,10){Etiam lobortis facilisis sem.};
node[rotate=90] (a1) at (0.2,10){Nullam nec mi et neque pharetra sollicitudin.};

end{tikzpicture}
end{document}

documentclass{scrartcl}
usepackage{geometry}
geometry{papersize={307mm,210mm}}
usepackage{pdfpages}

begin{document}
includepdfmerge[nup=3x1]{back,spine,front}
end{document}