Hmmmm...not sure, entirely. I think it's that, by putting in more effort, I end up processing the book mentally in a more thorough way. Something like what my

Hmmmm...not sure, entirely. I think it's that, by putting in more effort, I end up processing the book mentally in a more thorough way. Something like what my grade school literature teacher might have said was the point of book reports. Thinking over "well, exactly what did I think of it?" tends to make me think over the book's contents more carefully, instead of just putting it down and immediately moving on.