Ben Dylan Aaronovitch (born 22 February 1964) is an English author and screenwriter. He is the author of the series of novels Rivers of London. Aaronovitch wrote two Doctor Who serials, Remembrance of the Daleks (1988) and Battlefield (1989), for BBC television, and also the novelization of the former. He wrote one episode for Casualty (1990) and was then a regular writer on the science fiction series Jupiter Moon. He subsequently wrote or co-wrote three Doctor Who spin-off novels in the Virgin Publishing New Adventures range; he created the character Kadiatu Lethbridge-Stewart who became a semi-regular in the New Adventures. He has also written a novel and several short stories published by Big Finish Productions featuring the character of Bernice Summerfield, who was originally developed in the New Adventures. He also co-wrote a Doctor Who audio drama for Big Finish, and has written a number of Blake's 7 spin-off audio dramas.