The R Book
R Cookbook: Proven Recipes for Data Analysis, Statistics, and Graphics (O'reilly Cookbooks)
R in Action: Data Analysis and Graphics with R
Advanced R (Chapman & Hall/CRC The R Series)
R Packages: Organize, Test, Document, and Share Your Code
An Introduction to Statistical Learning: with Applications in R (Springer Texts in Statistics)
Hands-On Programming with R: Write Your Own Functions and Simulations
Practical Data Science with R
Applied Predictive Modeling