What the Archive’s book library does is scan paper books to make their own digital copies so that they can loan them without letting tech companies and publishing conglomerates spy on readers. https://www.fightforthefuture.org/news/2023-12-07-25-human-rights-organizations-call-on-2024-congress-to-investigate-big-tech-and-publishings-stranglehold-over-digital-books
And loan such books out in a 1-to-1 ratio, just like they would the paper book sitting in their warehouse, without paying totally atrocious licensing fees over and over.
https://ebooksforus.com/