In a Venn diagram of my fans there’s probably an overlapping bit in the middle that looks like the eye of Sauron,” says Banks of his two audiences. “But it’s kind of hard to tell. A lot of mainstream readers just don’t read science fiction. They just can’t be doing with it. Science-fiction readers tend to be a bit more catholic in their tastes. I should really start at gigs and events by putting a bit of a questionnaire out … do a little bit of market research.