Index: modules/book/book.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/book/book.module,v
retrieving revision 1.433
diff -u -r1.433 book.module
--- modules/book/book.module	11 Aug 2007 14:06:15 -0000	1.433
+++ modules/book/book.module	13 Aug 2007 23:03:37 -0000
@@ -526,8 +526,16 @@
  */
 function book_remove_form(&$form_state, $node) {
   $form['#node'] = $node;
+  $title = array('%title' => $node->title);
 
-  return confirm_form($form, t('Are you sure you want to remove %title from the book hierarchy?', array('%title' => $node->title)), 'node/'. $node->nid, array('yes' => t('Remove')));
+  if ($node->book['has_children']) {
+    $description = t('%title has associated child pages, which will be relocated automatically. This may make it difficult to re-create the existing hierarchy.', $title);
+  }
+  else {
+    $description = t('%title may be added to hierarchy again using the Outline tab.', $title);
+  }
+
+  return confirm_form($form, t('Are you sure you want to remove %title from the book hierarchy?', $title), 'node/'. $node->nid,  $description, t('Remove'));
 }
 
 /**