You can always check out the e-book version even if you go find a physical copy to read instead. I saw a librarian asking people to do stuff like that since the active use of library services let's them argue for better funding and services.

Also, see if they have a physical copy at another branch. My local library is part of a network that spans across multiple towns, and they can often get books sent to them from other branches if they don't have a copy themswlves.