1. Copy the discount code of Textbooks you want on the page and click to get code.
2. Next, you'll witness the offer code being showcased and auto-copied to your clipboard.
3. You'll subsequently have to navigate back to the Textbooks's checkout page, locate the promo code box, and insert the code you just duplicated into it.
4. The last step is for you to click on the apply code, and it will immediately show whether the offer is applied to the order.