diff --git a/book/features/favourites.md b/book/features/favourites.md
index 34e5e54..58557d9 100644
--- a/book/features/favourites.md
+++ b/book/features/favourites.md
@@ -46,7 +46,7 @@ TeachBooks Favourites is a Sphinx extension which collects all of TeachBooks' fa
 - [Sphinx Gated Directives](../_git/github.com_TeachBooks_Sphinx-Gated-Directives/main/MANUAL.md)
 - [Teachbooks Zoomies](https://github.com/TeachBooks/TeachBooks-Zoomies/)
 - [TeachBooks Questions](../_git/github.com_TeachBooks_TeachBooks-Questions/main/MANUAL.md)
-
+- [Sphinx Sticky Margin](../_git/github.com_TeachBooks_Sphinx-Sticky-Margin/main/MANUAL.md)
 
 The extension [Open in new tab](https://pypi.org/project/sphinx-new-tab-link/) is nice, but is not compatible with all setups (dependency clash) so is not included in TeachBooks-Favourites.