+require_once INCLUDES . '/3rdparty/htmlpurifier/HTMLPurifier.auto.php';
+
+# epub library
+require_once INCLUDES . '/3rdparty/libraries/PHPePub/Logger.php';
+require_once INCLUDES . '/3rdparty/libraries/PHPePub/EPub.php';
+require_once INCLUDES . '/3rdparty/libraries/PHPePub/EPubChapterSplitter.php';
+