If you purchased the Wool eBook, thinking you were getting the 508 book, as the description on the product page says, you did not. I was on the phone with Barnes & Noble for half an hour and despite the fact that it is their website, they will not honor the price and blame the publisher for this error. I am sure the website will be changed soon, but I do have a printout of the original product page if you need it.
You can call Customer Service and demand a refund. I did.
Sorry about that guys!