[valex]

Originally Posted by valex

Another problem is that Kindle centers partially full pages (starts/ends of chapters) vertically

Update: fixed by placing invisible (light gray) dots into the corners

\usepackage[width=85.09mm, height=111.76mm, center]{crop}

\usepackage[pdftex]{pict2e}
\usepackage{color}
\definecolor{light-gray}{gray}{0.95}

\newcommand*\cornerCrop{% 
  \begin{picture}(0,0)
    \unitlength1pt
    \put(0,0){\color{light-gray}\circle*{1}}
\end{picture}}

\cropdef\cornerCrop\cornerCrop\cornerCrop\cornerCrop{cornerDots}
\crop[cornerDots]