John Banville: It’s immensely hard work, but what’s the point of doing easy work?  It’s immensely rewarding.  It’s immensely infuriating and painful and horrifying at times.  I remember when I was doing one of my books and it was giving me a sense of trouble. I sat down in a chair one day.  I couldn’t do any more.  I actually had a vision of myself writhing in pain on the floor.  So it’s terribly, terribly difficult.  But you know, anything worthwhile doing is always difficult.