Secrets of the Stacks: How libraries decide which books to keep ..
Since every system of elimination is based, no matter what they say, on circulation counts, the number of years that have elapsed since a book was last checked out, or the number of times it has been checked out overall, if you feel strongly about a book, you should go to every library you have access to and check out the volume you care about. Take it home awhile. Read it or don’t. Keep it beside you as you read the same book on a Kindle, Nook, or iPad. Let it breathe the air of your home, and then take it back to the library, knowing you have fought the guerrilla war for physical books.