bookdealpass:allbooksforless
Bought a $5 book from one of this companies locations (all books $5, there seem to be a few of these around) and once I had purchased it I got handed a bookmark with the coupon code to receive $5 off an order that is $35 or more. It says to enter it into the shopping cart for an immediate $5 discount. I had a quick browse through the website and the books seemed very reasonably priced to start with.
Coupon code: bookdeal
Password: allbooks4less