Some of the books we will use in the course is available for free for students at UiO in the O'Reilly library. All you need is to use your UiO e-mail address. You have to take some care, though. The first time you logon with your username, you are asked to complete a registration and make a password. You should absolutely follow these instructions! If you don't register, you may get problems the nest time you try to logon.
By the way, there are many other useful books at the O'Reilly web page on machine learning, Python and other topics that might interest you.