diff --git a/src/cobots2024/book/_toc.yml b/src/cobots2024/book/_toc.yml
index 8cdc376..321b53c 100644
--- a/src/cobots2024/book/_toc.yml
+++ b/src/cobots2024/book/_toc.yml
@@ -18,6 +18,9 @@ parts:
       - file: week03/index
         sections:
           - file: week03/lecture
+          - file: week03/ros-intro
+          - file: week03/ros-setup
+          - file: week03/ros-install
   - caption: About
     chapters:
       - file: syllabus/index