Beloved British literary genre fiction writer Nick Harkaway talked with megafan Jenn Northington of BookRiot about his cerebral epic scifi novel Gnomon in his first ever New York City public event. Harkaway and Northington discussed the complex diagrams required for Harkaway to keep track of his own plot, genre categories in the US and the UK, the proud tradition of the police procedural, the need for writers to help readers imagine possible and inevitable futures, and the weird reality of mice sharing a single brain.