How well does the boss know me?
"No, he's still here because his book's still here. He'd leave without his jacket, his cigarettes or his sunglasses, but he wouldn't leave without his book."
A co-worker communicates my boss' words when he stopped by my desk last night, around 7:30 looking for me. I was, as he accurately, surmised, still around and yes, I wouldn't have left without my book.
But he's shit out of luck. I'm not above buying two copies of any book I'm reading and leaving one at my desk, at all times.