Barnes & Nobel is offering BOGO 50% over the Columbus Day weekend starting from Saturday, October 10th to Monday, October 14th. Valid both online and in-store.
Also, use “FRIENDNFAM” to get additional 20% per one item, one time use. (Some people are unable to use the 20% off on top of 50% off but it worked for me. I think the difference was that I purchased two different sets with the same value).
Happy Columbus Day!