diff --git a/_quarto.yml b/_quarto.yml
index 4768ee9..3c0a6e5 100644
--- a/_quarto.yml
+++ b/_quarto.yml
@@ -18,6 +18,9 @@ book:
   repo-url: https://github.com/hadley/r4ds/
   repo-branch: main
   repo-actions: [edit, issue]
+  sidebar:
+    - text: Buy the printed book
+      href: https://www.amazon.com/dp/1492097403?&tag=hadlwick-20
   chapters:
     - index.qmd