He wanted to tell her that she didn't disturb; she rearranged. That was dangerous to say aloud. Instead, he asked, "Do you ever want to stop being careful? To throw a book in the air and see where it lands?"

I have to go, it said. I'm leaving for a while. Please don't follow.

She regarded the question as if testing whether it fit within acceptable margins. Then, with a softness he hadn't expected, she answered: "The rule that I cannot be surprised."