If you are looking to purchase any books over at Amazon, they are offering a $5 off code with a $20 purchase. Just use promo code NOVBOOK18 at checkout. This promotion expires November 25th.
You should also be able to stack this with the 20% off promotion by applying just 1 Membership Reward point.
Enjoy your Amazon savings and Happy Thanksgiving!
Disclosure: As an Amazon Associate I earn from qualifying purchases.