% A5, one column: for reading (the base version).
\documentclass[10pt,twoside]{article}
\usepackage[a5paper,inner=16mm,outer=22mm,top=16mm,bottom=20mm,
  marginparwidth=12mm,marginparsep=3mm]{geometry}
\input{phaedo-common}
\begin{document}
\frontpage
\heading
\input{phaedo-text}
\end{document}