diff --git a/content/_index.md b/content/_index.md
index 15ba341..677d4d9 100644
--- a/content/_index.md
+++ b/content/_index.md
@@ -23,8 +23,11 @@ Source code for tcsh releases can be downloaded from:
 
 ## User guides
 
-* [Archive for "Using csh & tcsh"](http://www.kitebird.com/csh-tcsh-book/)
 * [Frequently Asked Questions](faq/)
+
+
+## External resources
+
 * [Wikibook on "C Shell Scripting"](http://en.wikibooks.org/wiki/C_Shell_Scripting)
 
 
diff --git a/docs/index.html b/docs/index.html
index 3471de5..a6a2747 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -45,8 +45,10 @@ <h2 id="developer-resources">Developer resources</h2>
 </ul>
 <h2 id="user-guides">User guides</h2>
 <ul>
-<li><a href="http://www.kitebird.com/csh-tcsh-book/">Archive for &ldquo;Using csh &amp; tcsh&rdquo;</a></li>
 <li><a href="faq/">Frequently Asked Questions</a></li>
+</ul>
+<h2 id="external-resources">External resources</h2>
+<ul>
 <li><a href="http://en.wikibooks.org/wiki/C_Shell_Scripting">Wikibook on &ldquo;C Shell Scripting&rdquo;</a></li>
 </ul>
 <h2 id="archived">Archived</h2>
@@ -77,7 +79,7 @@ <h2 id="archived">Archived</h2>
 </p>
 
 
-<p>Page content last updated on 2022-01-15</p>
+<p>Page content last updated on 2024-05-17</p>
 
 
   
diff --git a/docs/sitemap.xml b/docs/sitemap.xml
index 19533fb..6c94a28 100644
--- a/docs/sitemap.xml
+++ b/docs/sitemap.xml
@@ -9,7 +9,7 @@
     <lastmod>2019-12-31T00:56:56+02:00</lastmod>
   </url><url>
     <loc>http://www.tcsh.org/</loc>
-    <lastmod>2022-01-15T09:43:57+02:00</lastmod>
+    <lastmod>2024-05-17T00:17:54+03:00</lastmod>
   </url><url>
     <loc>http://www.tcsh.org/y2k/</loc>
     <lastmod>2019-05-19T02:23:26+03:00</lastmod>