diff -r 07239de796bb -r e756a8c72c3d cms/drupal/modules/book/book.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cms/drupal/modules/book/book.js	Fri Sep 08 12:04:06 2017 +0200
@@ -0,0 +1,27 @@
+/**
+ * @file
+ * Javascript behaviors for the Book module.
+ */
+
+(function ($) {
+
+Drupal.behaviors.bookFieldsetSummaries = {
+  attach: function (context) {
+    $('fieldset.book-outline-form', context).drupalSetSummary(function (context) {
+      var $select = $('.form-item-book-bid select');
+      var val = $select.val();
+
+      if (val === '0') {
+        return Drupal.t('Not in book');
+      }
+      else if (val === 'new') {
+        return Drupal.t('New book');
+      }
+      else {
+        return Drupal.checkPlain($select.find(':selected').text());
+      }
+    });
+  }
+};
+
+})(jQuery);