I don't know how many of you use these, but they are on sale on Amazon.com for buy 3 get a 4th free. They are also eligible for free shipping if you spend over $25 which if you "buy" 4 you get free shipping. So here is how it works 6.95*4 = 27.76 (qualifies for free shipping) -6.95 free book Total is 20.81 shipped. I just ordered some so I know it works too!! That is the cheapest shipped home I could find for new books.
