If people ask me for the ingredients of success, I say one is talent, two is stubbornness or determination, and third is sheer luck. You have to have two out of the three. Any two will probably do.

I suspect that writer's block afflicts mainly people who have some stable and ample source of income outside of writing. So far it hasn't been a problem.

My gut feeling is that paper and ink are going to be with us for a long time yet, and in substantial quantities, though certainly books are now going to be available in other forms.

I wouldn't like to just do one story or one type of stories all the time.

I have some good stories yet to tell.

And what we know, or think we know, about the universe of space and time is changing very quickly.

I started writing seriously about 1960, at the fairly advanced age of 30.