This gist contains out.tex
, a tex file that adds a PDF outline ("bookmarks") to the freely available pdf file of the book
An Introduction to Statistical Learning with Applications in R, by Gareth James, Daniela Witten, Trevor Hastie and Robert Tibshirani
http://www-bcf.usc.edu/~gareth/ISL/index.html
The bookmarks allow to navigate the contents of the book while reading it on a screen.