There's definately a way to find the book code on the site itself - as that's where I gathered mine from. I think you go to your bookshelf, and on the left click on member and site discounts, and its somewhere in the menu that pops up. If its not that it was one of the other links surrounding it. Sorry I can't be more specific, but I definately remember it being there when I bought it.
Also fictionwise's 60% rebate thingy, has made me buy a lot of books
