Volume II's

I feel like such an idiot. First I decided not to buy my text books until I have a feel for the classes (whether I'm actually going to need them or not). Then I decided to buy online. Now one month after classes have started, I have some of my books that happens to be volume two's. That means as you open them, you will start at chapter 23 or 5. So now I must go back online and buy volume ones of these books. Argh, so frustrated. I have exams coming up really soon and the last thing I need is to be unprepared. The internet have it's limits.