diff --git a/README.md b/README.md
index 314b1f1..b75adfc 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,12 @@ IPython Notebooks geared towards Python data analysis (core Python, NumPy, panda
 
 [Coming Soon] IPython Notebooks demonstrating NumPy functionality.
 
+## References
+
+* [Python for Data Analysis: Data Wrangling with Pandas, NumPy, and IPython](http://www.amazon.com/Python-Data-Analysis-Wrangling-IPython/dp/1449319793/ref=sr_1_1?ie=UTF8&qid=1423228985&sr=8-1&keywords=python+for+data+analysis)
+* [Building Machine Learning Systems with Python](http://www.amazon.com/Building-Machine-Learning-Systems-Python/dp/1782161406/ref=sr_1_2?ie=UTF8&qid=1423229174&sr=8-2&keywords=machine+learning+python)
+* [Think Bayes](http://www.amazon.com/Think-Bayes-Allen-B-Downey/dp/1449370780/ref=sr_1_1?ie=UTF8&qid=1423229167&sr=8-1&keywords=think+bayes)
+
 ##License
 
     Copyright 2014 Donne Martin