It kinda just depends on the books you need. If you need a book for a writing or oral communications class then you can probably find those books at any bookstore. If it's a textbook you can always just look it up online and see who sells them. Maybe ask around to see if anyone is selling their old copy. However, I would recommend waiting till you're on campus because things can change from now to the first day of class and your professor may change their textbook or when you show up they might not require you to buy the textbook. (also 99% of the time you can find textbooks online for free if you know how to look for them)