College tuition and housing are expensive on their own, but going back to school has lots of costs that aren’t always apparent up front. Thinking and planning for these hidden expenses beforehand will help you stay on track with your budget and graduate with less student debt. One of the hidden expenses of going back to school is buying textbooks. Textbooks are much more expensive than regular books, and if each of your classes requires multiple books, the cost can add up before you know it. In this article, we have four tips on saving money on textbooks.