         editors: $.makeArray @$xml.find('meta[property="role"]:contains(edt)').map((i, el) => @$xml.find($(el).attr('refines')).text())
         translators: $.makeArray @$xml.find('meta[property="role"]:contains(trl)').map((i, el) => @$xml.find($(el).attr('refines')).text())
         illustrators: $.makeArray @$xml.find('meta[property="role"]:contains(ill)').map((i, el) => @$xml.find($(el).attr('refines')).text())
-        }, {doNotUpdate: true}
+        }
 
       # The manifest contains all the items in the spine
       # but the spine element says which order they are in

      title = titles.length and $(titles[0]).text() or ''

      # read out metadata
      @set {
        language: @$xml.find('language[xsi\\:type="dcterms:RFC4646"]').text()
        description: @$xml.find('description').text()
        rights: @$xml.find('rights').text()

  'hbs!templates/gh-book/nav-head-metadata'
], (
  Backbone,
  $,
  mediaTypes,
  allContent,
  loadable,
