Awesome strategy to keep digitization from becoming an overwhelming prospect—give priority to the books that are being requested in e-format.
Duke University Libraries say: “Starting this semester, Duke University faculty, students, and staff can request to have certain public domain books scanned on demand. If a book is published before 1923* and located in the Perkins, Bostock, Lilly, or Music Library or in the Library Service Center (LSC), a green “Digitize This Book” button will appear in its online catalog record. Clicking on this button starts the request. Within two weeks (although likely sooner), you will get an email with a link to the digitized book in the Duke University Libraries collections on the Internet Archive. You—and the rest of the world—can now read this book online, download it to your Kindle, export it as a PDF, or get it as a fully searchable text-only file. And you never have to worry about late fees or recalls!”