Amazon and B&N sale

Not sure why, but as of this morning - though I'm guessing for a limited time - Amazon and Barnes and Noble are both offering GONE 'TIL NOVEMBER for a special price of $13.74. That's 45% off the original cover price. It looks like one dropped the price, and the other did the same to match it. Doubt it will last though. Amazon's prices tend to fluctuate quite a bit.