The key to this collaboration - which we undertook after much deliberation - was to stretch creatively. New characters, new locales, new form (the novella).
That has to remain the principal reason for doing it, doesn't it? I know it's possible to write for money, and many very good writers have done so. But for me, it has to remain the principal thing that I actually want to do the writing.
That's what's so great about my job. I get paid to do what got me in trouble in grade school space out and play with my imaginary friends. In terms of Isaac, when the time's right.
I would never have been a novelist without working as a psychologist...it was a great education in human nature.
These people are real to me, and situations keep coming up where their emergence feels natural. It's like meeting old friends. I hope readers feel the same way.
We tend to read each other's books in sizeable chunks as they are written. I don't know that you could say we are ruthless with each other - in fact, I suppose we are very kind. There are ways to make suggestions which are not destructive.