From the Editor's Bookshelf: My Favorite Titles for Data Science and Machine Learning - insideBIGDATA

This text, which I call "ISL" is a simplified very of ESL – less breadth in statistical learning, and less math. The chapters are divided into theory sections, and code sections with actual examples in R. I really like this book since I use R pretty much exclusively for my work. Highly recommended if you use R. The authors Hastie and Tibshirani are the same for ESL.