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https://controlleddigitallending.org/"Controlled Digital Lending (CDL) is an emerging method that allows libraries to loan print books to digital patrons in a “lend like print” fashion. Through CDL, libraries use technical controls to ensure a consistent “owned-to-loaned” ratio, meaning the library circulates the exact number of copies of a specific title it owns, regardless of format, putting controls in place to prevent users from redistributing or copying the digitized version. When CDL is appropriately tailored to reflect print book market conditions and controls are properly implemented, CDL may be permissible under existing copyright law. CDL is not intended to act as a substitute for existing electronic licensing services offered by publishers. Indeed, one significant advantage of CDL is addressing the “Twentieth Century Problem” of older books still under copyright but unlikely ever to be offered digitally by commercial services."Signatories to the Position Statement on Controlled Digital Lending by Libraries include:Authors AllianceDigital Public Library of AmericaDuke University LibrariesInternet ArchiveUC Berkeley LibraryCalifornia Digital Library  On the Digital Lending Feature of the Internet Archive see here:https://archivalia.hypotheses.org/81128https://archivalia.hypotheses.org/97266See alsohttps://blog.ualberta.ca/controlled-digital-lending-a5e9d14dc56bhttp://blog.bibliothekarisch.de/blog/tag/controlled-digital-lending/https://publishingperspectives.com/2019/02/aap-slams-cdl-controlled-digital-lending-uk-authors-appeal-to-internet-archive-funders/https://www.ifla.org/node/91896?og=29