Here is a coupon code good for 33% off non-agency books at htttp://www.kobobooks.com:
Not sure how long it is good for, but I have been buying all morning: bought 5 books, 3 of which were on my PBS wishlist.
The non-agency books are those that have two prices listed: a retail price, and a Kobo discounted price. The coupon will only work on those. Most books are available in ePub format, so you will have to side load them onto your Nook or other ePub compatible device via the Adobe Digital Editions software or Calibre. Happy shopping!