I used their RL book for a course I taught. It's beautifully written and freely available (http://incompleteideas.net/book/the-book-2nd.html http://incompleteid

I used their RL book for a course I taught. It's beautifully written and freely available (http://incompleteideas.net/book/the-book-2nd.html http://incompleteideas.net/book/the-book-2nd.html)! I kept getting distracted by the beautiful writing that I would miss the actual content.