sales-aholic:

Today only – 

Amazon is offering an extra 25% off any one book! Just enter the promo code:

25OFFBOOK. This deal valid on print books sold by Amazon.com (Not third party sellers). Maximum discount of $10 off. These items ship free with a $35 purchase, or with Amazon Student or Amazon Prime! Hurry, this deal ends at 11:59pm pst on December 13th. Enjoy 🙂