Andrew Cartmel began a long and varied career in TV and publishing when he was hired as script editor on Doctor Who in 1986. He had a major (and very positive) impact on the final years of the original run of the TV show. He has recently completed a comedy for the London stage, Screwball, and is also writing the Vinyl Detective series of crime novels for Titan Books; the fourth, Flip Back, will be available soon. In his spare time, he likes to do stand-up comedy. Ben Aaronovitch is perhaps best known for his series of Peter Grant novels, which began with Rivers of London.