Okay, the headline is misleading. Of course, we need books. In fact, they are being preserved by converting them to digital form. However, some books are so fragile and rare that merely touching them can cause their destruction. MIT researchers are using Terahertz radiation to see "through" the pages of a book in order to read the contents. The technology is limited to a few pages now; but, in the future, this will become a standard way of preservation of antique books.