diff --git a/modules/book/book-navigation.tpl.php b/modules/book/book-navigation.tpl.php
index 5d8e9aa..135ddfb 100644
--- a/modules/book/book-navigation.tpl.php
+++ b/modules/book/book-navigation.tpl.php
@@ -30,22 +30,23 @@
  */
 ?>
 <?php if ($tree || $has_links): ?>
-  <div id="book-navigation-<?php print $book_id; ?>" class="book-navigation">
+  <nav id="book-navigation-<?php print $book_id; ?>" class="book-navigation">
     <?php print $tree; ?>
 
     <?php if ($has_links): ?>
-    <div class="page-links clearfix">
+    <h2 class="element-invisible"><?php print t('Book Navigation'); ?></h2>
+    <ul class="page-links">
       <?php if ($prev_url): ?>
-        <a href="<?php print $prev_url; ?>" class="page-previous" title="<?php print t('Go to previous page'); ?>"><?php print t('‹ ') . $prev_title; ?></a>
+        <li><a rel="prev" href="<?php print $prev_url; ?>" class="page-previous" title="<?php print t('Go to previous page'); ?>"><?php print t('‹ ') . $prev_title; ?></a></li>
       <?php endif; ?>
       <?php if ($parent_url): ?>
-        <a href="<?php print $parent_url; ?>" class="page-up" title="<?php print t('Go to parent page'); ?>"><?php print t('up'); ?></a>
+        <li><a href="<?php print $parent_url; ?>" class="page-up" title="<?php print t('Go to parent page'); ?>"><?php print t('up'); ?></a></li>
       <?php endif; ?>
       <?php if ($next_url): ?>
-        <a href="<?php print $next_url; ?>" class="page-next" title="<?php print t('Go to next page'); ?>"><?php print $next_title . t(' ›'); ?></a>
+        <li><a rel="next" href="<?php print $next_url; ?>" class="page-next" title="<?php print t('Go to next page'); ?>"><?php print $next_title . t(' ›'); ?></a></li>
       <?php endif; ?>
-    </div>
+    </ul>
     <?php endif; ?>
 
-  </div>
+  </nav>
 <?php endif; ?>