Request physical copies of books you want to read, and that you think are beneficial to the community. And check them out from time to time.
I'm sure a librarian does their best to keep abreast with the latest best books.. but would they know the field better than someone in it?
I've been told they have experts that consult on title selection. But based on the 004-006 section at most libraries, I can only infer that is the IT guy at the senior center..