Tomorrow's Solution: In the future, installation of on-demand printing systems directly in bookstores could allow retailers to fulfill consumers' orders in less than an hour. Early efforts at in-store installations, however, have been challenging. For example, a recent report noted that Sprout, a company that sells in-store printing systems, delayed its test with the college bookstore company Follett. The original agreement called for Sprout to install its POD machines in four Follett locations. Spokespeople for both Sprout and Follett did not say what specifically was causing the postponement. However, many industry observers believe a significant number of bookstores may someday begin to produce books on-site, increasing the speed of POD order-fulfillment considerably.