diff --git a/book/extension_exercises/014.md b/book/extension_exercises/014.md
index 3e716d2..8724c83 100644
--- a/book/extension_exercises/014.md
+++ b/book/extension_exercises/014.md
@@ -1,4 +1,4 @@
-# Custom cell tags
+# Live code
 
 With live coding you can make your pages more interactive by adding live, executable code cells. This extension is already part of your TeachBooks book if you started from the template. If not, you can follow instructions [in the manual](https://teachbooks.io/manual/features/live_code.html#setting-up-python-live-coding) to enable it. The template also includes a sample page with live code enabled, which you can find [here for the website of the original template](https://teachbooks.io/template/some_content/text_and_code.html)
 
diff --git a/book/extensions.md b/book/extensions.md
index 6cee792..99aeb06 100644
--- a/book/extensions.md
+++ b/book/extensions.md
@@ -1,3 +1,3 @@
 # Extension exercises
 
-The previous exercises introduced you to the basics of writing content for your TeachBook, as well as getting started with the syntax used. Now let’s explore how you can add functionalities to your book using extensions. TeachBooks created a variety of Sphinx extensions to enhance your book, and you can also install third-party extensions to further customize your content.
+The previous exercises introduced you to the basics of writing content for your TeachBook, as well as getting started with the syntax used. Now let’s explore how you can add functionalities to your book using extensions. TeachBooks created a variety of Sphinx extensions to enhance your book: see [the manual](https://teachbooks.io/manual/features/overview.html) for a complete overview, including [TeachBooks Favourites](https://github.com/TeachBooks/TeachBooks-Favourites) which collects a collection of our favourite Sphinx extensions. The TeachBooks Favourites collection is already included in this template. Furthermore, you can also install third-party extensions to further customize your content.