I know the semester is almost over, but I just bought my Chemistry and Med term. books for my summer classes at this great site I found:
I got my books used, that would have cost me over $100 used at my bookstore, on this site for $12.78 together! Plus, they are a non profit that helps fund literacy programs in underserved countries. They accept book donations to sell too, for those books you don't want to save.
I liked it so much, I went back later and bought several more books, older Med Surg texts, RNotes, Pharmacology study guide...all for less than $5.oo each and they offer free shipping standard.
I get so excited when I score, just wanted to share!