A 1979 period children’s adventure film, directed by a man known for his socially critical directing style and for his socialist ideals, which are evident in his film treatment of social issues, was based off a novel by what author?
Black Jack (1979 film): Black Jack is a 1979 period children’s adventure film, directed by Ken Loach and based on the Leon Garfield novel. Ken Loach:  He is known for his socially critical directing style and for his socialist ideals, which are evident in his film treatment of social issues such as poverty ("Poor Cow", 1967), homelessness ("Cathy Come Home", 1966) and labour rights ("Riff-Raff", 1991, and "The Navigators", 2001).
Leon Garfield