I'm sure the staff at your libraries would be very happy to receive your compliments, too. I worked many years in a library, and it's always nice to know how much people appreciate the books and other items that have been selected for patrons. It is not an easy job of selecting materials or to keep programs running, and the staff is there to provide those things for you, so a compliment--or a recommendation or constructive criticism--should be welcome. Oops, I'll get off my soapbox now.....