If search for a college textbook book using the ISBN number?

and i decided to buy the book but the publication date and copyright date differs by two years, such as the one I was told to buy is copyright 2009 but the one i buy online is copyright 2007, is there going to be any difference?|||Just check and make sure it's the same edition - that's what matters most with a textbook. If your professor assigned the Fourth Edition and you bought the Second Edition, there could be things missing from your book that are necessary.|||Yes, the newer copyright has updated material (added chapter(s) and/or revisions. You might not notice a big difference, but it will be there. You should be fine with the 2007 version but I would ask the professor if this version is acceptable to use.