diff --git a/book/syntax_exercises/012.md b/book/syntax_exercises/012.md
index b9a7d45..bb0b7f3 100644
--- a/book/syntax_exercises/012.md
+++ b/book/syntax_exercises/012.md
@@ -7,7 +7,7 @@ Can you structure your content with different types of admonitions and understan
 ::::::
 
 ```{tip}
-Admonitions help to guide readers' attention and make your book more accessible. Full documentation is available [here](https://myst-parser.readthedocs.io/en/latest/syntax/admonitions.html).
+Admonitions help to guide readers' attention and make your book more accessible. Full documentation is available [here for the default MyST syntax in your book](https://myst-parser.readthedocs.io/en/latest/syntax/admonitions.html) and [here for the TeachBooks' extension which allows custom colours](https://teachbooks.io/manual/external/Sphinx-Named-Colors/README.html#admonitions).
 ```