Alan Zweibel hears voices in his head.
"All the time, when I'm writing -- and this goes on for many, many years -- the TV is on when I'm writing at home," he says. "The volume is down, and it's usually a show that I've seen before. 'Law and Order,' you know, 'SVU.' Something that's not going to take my mind off my work, but it's like a white noise in the background, there's an ambience to it. And if something does catch my eye, between sentences or paragraphs, I'll turn the volume up a little. But it is a constant companion."