Deal of the day: take an extra 30% off any book on Amazon

There are still few hours left on the Amazon 30% off any book offer:

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 November 30, 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.

More information is available here.

The photography book section on Amazon can be found here.