Question: novelists who are also screenwriters?
Answer: Agatha Christie. Agatha Christie is the best-selling novelist of all time — known for her 66 detective novels and 14 short story collections. ... 
George R.R. Martin. ... 
Joan Didion. ... 
Mario Puzo. ... 
Michael Crichton. ... 
Gillian Flynn. ... 
F. ... 
Margaret Atwood.