Politics and Prose in D.C. is exemplifying the latest in indie bookstore innovation—they’re introducing the printed-on-demand book. Apparently it takes six minutes to turn over a print book, and customers can watch it happen. And it’s all made possible by an Espresso Book Machine. It seems like with every crafty offering that Amazon makes (like introducing a chat with the author option on ebooks), stakes are raised with booksellers everywhere, but at least bookstores are staying crafty.