Ask MeCha: Textbooks are expensive! →
I'm starting a university class tomorrow, and opted to buy the textbook used from an online source and saved over $100.
I got the textbook today, and it's an older edition than the one the class will be using. The ISBN in the book is completely different from the ISBN it's listed under, so I am certain I could get a refund. But the class does start tomorrow night, and I did only pay $15 for this book (including shipping).
So how different can editions be? The newest one (ed. 4) was published in 2008, the one I have (ed. 3) in 2004. Should I be able to get by in class with the older version? It's a French class, if that makes any difference.