TexasCHLforum.com

Not only will Amazon buy them back, but send you the label to return them! I purchased a used one from them and it was supposed to have a practice test CD with it. It did not. I emailed what I should do, and as I did not have time to wait for a new one they credited the entire purchase price and said I could keep the book or sell it back when I was done. I have been very pleased with Amazon's text book.

A friend of mine rents hers through CHEGG.com and is very happy with them.

Wherever you get them be sure to have the ISBN number so you get the righ book. So many change editions very quickly.