diff --git a/02_data_science_defined.Rmd b/02_data_science_defined.Rmd
index c033f35..7741106 100644
--- a/02_data_science_defined.Rmd
+++ b/02_data_science_defined.Rmd
@@ -4,8 +4,6 @@
 # This thing called "data science" {#datasciencedefined}
 
 
-***
-
 ## Theory
 
 David Donoho (2015) [_50 Years of Data Science_](http://courses.csail.mit.edu/18.337/2015/docs/50YearsDataScience.pdf), based on a presentation at the Tukey Centennial workshop, Princeton NJ Sept 18 2015.
@@ -39,7 +37,11 @@ Tim Davies and Mark Frank (2013) [‘There’s no such thing as raw data’. Exp
 
 
 
-## The Practice of Data Science
+## The Practice of Data Science & Statistics
+
+Steph de Silva and John Ormerod, [The Bayesian and The Frequentist](https://www.thebayesianandthefrequentist.com/2019/03/12/to-whom-it-may-concern/) {blog}
+
+
 
 ### R
 
diff --git a/index.Rmd b/index.Rmd
index 1b6ba3f..a516c5a 100644
--- a/index.Rmd
+++ b/index.Rmd
@@ -14,7 +14,7 @@ description: "A modest and very incomplete listing of resources for tackling dat
 
 # Preface {-}
 
-This book grew out of my every-growing collection of reference materials that was saved as an expanding array of markdown files in a github repo. By assembling it as a book, it's hoped that it will be more accessible and useful to other R users.
+This book grew out of my evergrowing collection of reference materials that was saved as an expanding array of markdown files in a github repo. By assembling it as a book, I hope that it will be more accessible and useful to other R users.