diff --git a/index.rmd b/index.rmd
index daf0bac..c7e31da 100644
--- a/index.rmd
+++ b/index.rmd
@@ -15,3 +15,9 @@ This is the book site for __"R for data science"__. This book will teach you how
 To be published by O'Reilly in July 2016. 
 
 <img src="cover.png" width="250" height="328" alt="Cover image" />
+
+## Table of contents {#toc}
+
+<ul class="toc">
+  {% include package-nav.html %}
+</ul>