Mass digitization of the bound volumes that we generally call "books" has begun, and, thanks to the interest in Google and all that it does, it is getting widespread media attention. The Open Content Alliance (OCA), a library initiative formed after Google announced its library book digitization project, has brought library digitization projects into the public eye, even though libraries were experimenting with digitization for at least a decade. What is different today from some earlier digitization of books is not just the scale of these new initiatives, but the quality of "mass."