diff --git a/marketing-site/README.md b/marketing-site/README.md
index 9041071..ac68652 100644
--- a/marketing-site/README.md
+++ b/marketing-site/README.md
@@ -43,4 +43,4 @@ npm install
 npm run dev
 ```
 
-Then open [http://localhost:3000/read](http://localhost:3000/read). One chapter is filled (Real Estate, with nested RE-04 and RE-05). This is a demo, not the live book.
+Then open [http://localhost:3000/read](http://localhost:3000/read). One chapter is filled (Real Estate, with nested RE-01 and RE-02). This is a demo, not the live book.