Seth Godin: It's not the rats you need to worry about
"Amazon and the Kindle have killed the bookstore. Why? Because people who buy 100 or 300 books a year are gone forever. The typical American buys just one book a year for pleasure. Those people are meaningless to a bookstore. It's the heavy users that matter, and now officially, as 2009 ends, they have abandoned the bookstore. It's over."
Who are the heavy users in your library? Can you see anything on the horizon that's going to cause your best customers abandon your library?