Purchasing Text Books

<p>I have a list of my c;lasses...should i buy my books online NOW thru Barnes and Noble...or I heard that it's better to wait til after the first class to find outr what the professor wants-- or to see if there's anyone you can share a book with?</p>

<p>I'd rather get it over with and buy everything now, but if I can save some $$$....</p>