I read this article recently and was tickled to see a cookbook I own (The Last Course) had increased a bit in value. But, now I have had it hit three cookbooks I have been searching for and I am not happy. What is going on? Is there some new, secret demand for obscure professional cookbooks that is driving up the prices? I had ordered Laduree: The Sweet Recipes on Amazon for $26. A week later they emailed me to tell me the seller no longer had it available. Now they have a used copy on Amazon for $999. Yes, that really says $999!!! Likewise, I had been saving another cookbook in my cart, but now I am ready to purchase it and the price had literally doubled within 2 months. With the economy as it is, I would have rather expected more people dumping used cookbooks on the market, driving down prices. But this kind of stinks.