Books can be pricey but sometimes you can find the international version of the book online that's is way cheaper than the real book. I would have to warn you that the risk with buying the international version is that they are sometimes slightly distinct than the original but sometimes they are exact. Also their is a con to buying the original book; sometimes you don't even used the book in class. I am saying this from experience. I would suggest you wait until you start class to determine if you are really going to need the book, if you do buy them online.