As librarian Matt Imrie just tweeted, Public Libraries are FREE at point of service because you've already paid for them through taxes. When Public Libraries are shut down/handed to volunteers... you ARE STILL PAYING FOR THEM - you just don't get the service you paid for!
Use your library - every book checked out helps the library demonstrate that it's in use, and authors get a little Public Lending Right payment! (In fact, we often get a few more pennies from a library loan than we do from a book sale at an ultra-discount bookshop!) So never feel bad about checking out a book from the library instead of buying it; writers and illustrators love and need libraries.
You can download this poster here, in A4, A3 and US Letter size, along with lots of other library posters in various formats!