[In an atmosphere of liberty, one is as free to not open a book as to open it. Although simple in concept, that is not necessarily an easy condition to maintain.] All of us can think of a book that we hope none of our children or any other children have taken off the shelf, ... But if I have the right to remove that book from the shelf -- that work I abhor -- then you also have exactly the same right and so does everyone else. And then we have no books left on the shelf for any of us.

Katherine Paterson