I only did about one novel a year while I was working full time, but since 1993, I've averaged two and a half books a year.
According to my royalty statements, 'The Green Progression' sold 392 copies in hardcover.
'The One-Eyed Man' is a novel that was one I never intended to write.
Science fiction writers have usually been very poor prognosticators of the future, either in literary or technological terms, and that's because we're all too human and, I think, have the tendency to see what we want to or, in the case of those more paranoid, what we fear.