1. Introduction to Data Science: Data Analysis and Prediction with R, Rafael A. Irizarry
2. Generalized Additive Models: an introduction with R, Simon Wood
3. Elements of Statistical Learning by Jerome H. Friedman, Robert Tibshirani, and Trevor Hastie
4. Advanced Data Analysis from an Elementary Point of view, Cosma Rohilla Shalizi
5. Mixed Effects Models and Extensions in Ecology with R, Alain F. Zuur, Anatoly A. Saveliev, Elena N. Ieno, and Graham M. Smith
6. An Introduction to Statistical Learning with Applications in R, Gareth James, Daniela Witten, Trevor Hastie and Robert Tibshirani
7. Bootstrap Methods: A Guide for Practitioners and Researchers, Michael R. Chernick.