Index: book.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/book.module,v
retrieving revision 1.285
diff -u -r1.285 book.module
--- book.module	12 Feb 2005 07:51:14 -0000	1.285
+++ book.module	18 Feb 2005 02:44:22 -0000
@@ -55,12 +55,16 @@
 
   $links = array();
 
+  $hide_printer_friendly = variable_get('book_hide_printer_friendly', 0 );
+
   if ($type == 'node' && $node->type == 'book') {
     if (!$main) {
       if (book_access('create', $node)) {
         $links[] = l(t('add child page'), "node/add/book/parent/$node->nid");
       }
-      $links[] = l(t('printer-friendly version'), 'book/print/'. $node->nid, array('title' => t('Show a printer-friendly version of this book page and its sub-pages.')));
+      if ( !$hide_printer_friendly ) {
+        $links[] = l(t('printer-friendly version'), 'book/print/'. $node->nid, array('title' => t('Show a printer-friendly version of this book page and its sub-pages.')));
+      }
     }
   }