diff --git a/core/modules/help/help_topics/book.about.html.twig b/core/modules/book/help_topics/book.about.html.twig
similarity index 100%
rename from core/modules/help/help_topics/book.about.html.twig
rename to core/modules/book/help_topics/book.about.html.twig
diff --git a/core/modules/help/help_topics/book.adding.html.twig b/core/modules/book/help_topics/book.adding.html.twig
similarity index 100%
rename from core/modules/help/help_topics/book.adding.html.twig
rename to core/modules/book/help_topics/book.adding.html.twig
diff --git a/core/modules/help/help_topics/book.configuring.html.twig b/core/modules/book/help_topics/book.configuring.html.twig
similarity index 100%
rename from core/modules/help/help_topics/book.configuring.html.twig
rename to core/modules/book/help_topics/book.configuring.html.twig
diff --git a/core/modules/help/help_topics/book.creating.html.twig b/core/modules/book/help_topics/book.creating.html.twig
similarity index 100%
rename from core/modules/help/help_topics/book.creating.html.twig
rename to core/modules/book/help_topics/book.creating.html.twig
diff --git a/core/modules/help/help_topics/book.organizing.html.twig b/core/modules/book/help_topics/book.organizing.html.twig
similarity index 100%
rename from core/modules/help/help_topics/book.organizing.html.twig
rename to core/modules/book/help_topics/book.organizing.html.twig
diff --git a/core/modules/help/help.api.php b/core/modules/help/help.api.php
index 287c791d3ac1167497c7b24f0483703e7111ca3b..7d7c25a5dcfde3c534ac00fc7e6ec4cdb3353026 100644
--- a/core/modules/help/help.api.php
+++ b/core/modules/help/help.api.php
@@ -53,7 +53,7 @@
  * - Module overview help, see content_translation_help(). Module overview
  *   help should follow
  *   @link https://www.drupal.org/node/632280 the standard help template. @endlink
- * - Page-specific help using only routes, see book_help().
+ * - Page-specific help using only routes, see node_help().
  * - Page-specific help using routes and $request, see block_help().
  *
  * @param string $route_name