Tyler Cowen is testing a novel marketing (?) conceit: buy his forthcoming book in order to receive access to his secret blog. "[J]ust send an email to IBoughtTylersBook@gmail.com and tell me you bought the book," he writes. "I'll send you the site address as soon as I can. But please, in receiving the site address you are making a pledge not to give it away, publish it, blog it, or otherwise reveal it."
I can't imagine someone hasn't yet let the cat out of the blog, but I haven't looked. According to one commenter, the book ranked 1,797 on Amazon before the post, and was around 240 by the end of the day.