Joe Sabia says, "This is a sign that hangs from the wall of my local public library in Milford, Connecticut. It's a large but quaint building occupied by maybe 6 or so people, and 3 elderly kind women at the check out desk." Click for larger size.
Update: Boing Boing pal Seth Godin writes,
Apparently, it comes from this book which is in itself quite an amusing read, as far as the reviews indicate…