"I don't think I'm an exceptionally bad reader. I suspect that many people, maybe even most, are like me. We read and read and read, and we forget and forget and forget. So why do we bother? Michel de Montaigne expressed the dilemma of extensive reading in the sixteenth century: "I leaf through books, I do not study them," he wrote. "What I retain of them is something I no longer recognize as anyone else's. It is only the material from which my judgment has profited, and the thoughts and ideas with which it has become imbued; the author, the place, the words, and other circumstances, I immediately forget." He goes on to explain how "to compensate a little for the treachery and weakness of my memory," he adopted the habit of writing in the back of every book a short critical judgment, so as to have at least some general idea of what the tome was about and what he thought of it. "