diff --git a/source/syllabus/syllabus.ptx b/source/syllabus/syllabus.ptx
index 4584d1e..541e617 100644
--- a/source/syllabus/syllabus.ptx
+++ b/source/syllabus/syllabus.ptx
@@ -102,7 +102,7 @@
         <title>Textbook</title>
 
         <p>
-          Course notes are available at...(TODO)
+          Course notes are <url href="https://andyeisenberg.github.io/Probability-and-Statistics-Notes/frontmatter.html">freely available online</url>.
         </p>
       </li>