vhf/free-programming-books — pull request #669 by jdavis (2014-01-25 05:18:58+00:00)
Title: Add ISL, change ESL to Machine Learning

I added [An Introduction to Statistical Learning](http://www-bcf.usc.edu/~gareth/ISL/) to the Machine Learning section. The book by two of the other two authors was in the Data Mining section and I feel that it belongs more in the ML section along with ISL.