If you'll think about various series you've read, can you think of any instance in which, say, the tenth volume of the series is notably better than the first nine? I can't.

I do like to explore evil characters in my books.

Once you have invented a character with three dimensions and a voice, you begin to realize that some of the things you'd like him to do to further your plot are things that such a person wouldn't, or couldn't, do.

It's important, I think, for a writer of fiction to maintain an awareness of the pace and shape of the book as he's writing it. That is, he should be making an object, not chattering.

The characters you refer to as predatory and unsavory are useful. They're the ones who make a novel into a thriller. They're active, and most of the common virtues, the signs of a good person, are not.

Contrary to what many writers imply about the process, nobody forces a writer to sell his work to the film industry.

You have very accurately described the difficulty of presenting my books on film: many of my characters are alone most of the time, and when they do talk, what they say is mostly lies. That can make for a pretty confusing film.