The textbook Exploring Geographic Information Systems, second edition is the required text for this class. You might as well get it at the best price. Here are some alternatives that I can find.
Try some other sources, you may find it cheaper...
Yes, this is a textbook I wrote, I get a (small) royalty on each new book sold. To avoid conflicts, I have committed to donate the royalties from this class to the Geography Department to be used for student support. I calculate this amount on the basis that all students buy the book.
A fairly complete GIS bookstore, still stocking the first edition...
Version of 24 September 2003