Before becoming a bestselling author, Ben Aaronovitch was a screenwriter for Doctor Who and a bookseller at Waterstones. He now writes full-time, and every book in his Rivers of London series has been a Sunday Times Top Ten bestseller. He is published in fourteen languages and has sold more than 2 million copies around the world. Aaronovitch is also a trustee on the board of Cityread London and is a long-time supporter of Nigeria's premiere arts and cultural festival, The Ake Festival. He still lives in London, the city he likes to refer to as "the capital of the world."

As an award-winning audiobook narrator, Penelope Rawlins has voiced over 200 audiobooks and was nominated by Audible for Narrator of the Year in 2013. Her favorite titles include The Turn of the Screw, Homeland: Carrie's Run, Homeland: Saul's Game (based on the CBS television series), The Sex Lives of Siamese Twins by Irvin Welsh, The Girl You Left Behind by Jojo Moyes, the Hattie B Magical Vet children's series, The Red Queen by Philippa Gregory, and The After Wife by Cass Hunter.