Mention of the discount was on the page when I looked at the 2015 AGC using my account. When I looked using my wife's account the discount was not mentioned but the code worked. Final price was just under $10. Discount good only on one book. Some of the fine print, Terms & Conditions ▪ To use this promotion, you must enter "HOLIDAY30" at checkout under the "Gift cards & promotional codes" section to receive 30% off any ONE (1) book purchased in your order (up to $10 promotional credit). ▪ This offer is only valid on print books. Excludes Kindle eBooks and Audible Audiobooks. ▪ The promotion is valid for a limited time only, from November 26, 2014 at 9pm PST to December 1, 2014 at 11:59pm PST. Amazon reserves the right to modify or cancel this offer at any time. ▪ Offer only applies to products sold and shipped by Amazon.com.