The library on campus was closed today. I used my access card to slip in the back entrance and walk through the empty rooms, past all the round tables and shelves of books. In my office, I cleared off my desk and filed folders from last semester. Then I put a sign on the door and locked it. I didn't see a single other person as I walked the snowy sidewalks back to my car. I won't return until August. I'm officially on sabbatical now.