Textbooks can be expensive, but you can often get a bargain by shopping around. Check out these links for more information:

Where to Find Textbooks on the Cheap : an article from bargain-hunting site RetailMeNot lists 11 options for renting or buying your textbooks.

TextbookRentals.com lets you compare prices from several textbook providers.

You can rent a physical copy for $40 or an ebook copy for $50. Almost reasonable, right?  

IMPORTANT! Search using the ISBN,  the International Standard Book Number, so that you get the exact edition you need!