File pre-flight tool for books

<iframe src="https://player.vimeo.com/video/279178802" width="640" height="360" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe><!-- [et_pb_line_break_holder] --><p><a href="https://vimeo.com/279178802">Your Books - Preflight Tool (File Checker)</a> from <a href="https://vimeo.com/user45483452">Yourbooks NZ</a> on <a href="https://vimeo.com">Vimeo</a>.</p>