diff --git a/index.rmd b/index.rmd
index 716b3a9..d089d94 100644
--- a/index.rmd
+++ b/index.rmd
@@ -10,6 +10,9 @@ 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. 
 
+__R for Data Science__ is the book that Garrett called __Data Science with R__ in
+__Hands-On Programming with R__.
+
 <img src="cover.png" width="250" height="328" alt="Cover image" />
 
 ## Table of contents