In the first batch of readers, back in the '60s and '70s, the criminal class was still literate, so I would get letters from people in prison; they thought that I was somebody whom they could shop-talk with, and they would tell me very funny stories. I got a lot of those. Guys who were going to wind up doing 10 to 15 for bank robbery, yes, were reading my books.

The fictioneer labors under the constraint of plausibility; his inventions must stay within the capacity of the audience to accept and believe. God, of course, working with facts, faces no limitation.

I've had stuff of mine adapted by other people, so I've come to the conclusion that a movie is a different form from a novel and there is no such thing as a true adaptation. You have to adapt to this other thing and do it right. But that voice of the original should somehow still be there, and the original intent should still be there. So if the original writer saw the movie, the writer would say, "Well, that's not what I wrote, but that's what I meant." And if you can do that, I think you've done your job as a screenwriter.

I make a note, set it aside, and hope it makes sense when the time comes to look at it again.

I know people who have suffered writer's block, and I don't think I've ever had it. A friend of mine, for three years he couldn't write. And he said that he thought of stories and he knew the stories, could see the stories completely, but he could never find the door. Somehow that first sentence was never there. And without the door, he couldn't do the story. I've never experienced that. But it's a chilling thought.

If your subject is crime, then you know at least that you're going to have a real story. If your subject is the maturing of a college boy, you may never stumble across a story while you're telling that. But if your story is a college boy dead in his dorm room, you know there's a story in there, someplace.

Science fiction is a weird category, because it's the only area of fiction I can think of where the story is not of primary importance. Science fiction tends to be more about the science, or the invention of the fantasy world, or the political allegory. When I left science fiction, I said "They're more interested in planets, and I'm interested in people."