I learned a few things about digital library books that made me sad:
* Publishers only allow a certain number of "rentals" of digital library books, after which the eBook license expires.
* Publishers also put an expiration date on the license, so after maybe two years, the eBook license expires even if nobody borrows the book.
* Publishers have repeatedly put hard limits on the abilities for libraries to purchase eBook licenses, for example allowing only one copy per library for new releases.
* Publishers raised the prices of library eBooks to be far higher than a physical book. A $15 physical book might cost $60 as an eBook to a library.