The main reading material for the course will come from:
Foundations of Applied Statistics
The following books are for optional, supplemental readings. They are all available for free, but note that some require a Princeton account to obtain them for free.
All of Statistics, by Wasserman
All of Nonparametric Statistics, by Wasserman
Data Analysis for the Life Sciences, by Irizarry and Love (source code)
The Elements of Statistical Learning, by Hastie, Tibshirani and Friedman