Caleb Azumah Nelson (b. 1993) is a British–Ghanaian writer and filmmaker, living in South East London. His debut novel, Open Water, was a no 1. Times Bestseller, won the Costa First Novel Award, and Debut Fiction Book of the Year at the British Book Awards. Nelson’s second novel, Small Worlds, was a Sunday Times Bestseller and won the 2024 Dylan Thomas Prize. The TV adaption of Open Water has been greenlit for an eight-part series by BBC One (Mam Tor/B-Side), with Nelson serving as lead writer, director, and executive producer.