Get 90% OFF at Kobo with fdkY9rd code! Not sure when it expires but it appears to be multi-use. Woot!
I can only use it multiple times if I purchase one at a time. If I put several books in my cart and apply the code it will only discount one of the books.
I don't think it will work on agency books. I've used it on Kensington/Zebra, Ellora's Cave, and Samhain so far.