Build your own JSON

gistfile1.py

object_list = []
for note in object_list:
  obj = {
      'id': note.pk,
      'note': note.note,
      'note.reader_book': {
          'id': note.reader_book.id,
          'title': note.reader_book.title,
          'subtitle': note.reader_book.subtitle,
          'authors': ", ".join(["%s" % a.get_full_name for a in note.reader_book.authors.all()]),
          'status': note.reader_book.get_status_display(),
          'rating': note.reader_book.rating,
          'tags': note.reader_book.tags,
          'url': 'http://readernaut.com%s' % note.reader_book.get_absolute_url()
      }
      'url': 'http://readernaut.com%s' % note.get_absolute_url(),
      'labels': note.labels(),
      'tags': note.tags,
      'page_reference': note.page_reference
  }
  object_list.append(obj)

simplejson.dumps(object_list, sort_keys=True, indent=4)