What is the author's style in Slave on the Block by Langston Hughes?

Hughes tells the story of Luther's interactions with the Carraways by using a third-person narrator, meaning that the events in "Slave on the Block" are described from the position of an outside observer. This third-person narrator is omniscient, having access to the characters' private thoughts. For example, the narrator is in a position to report, "They didn't understand the vagaries of white folks, neither Luther nor Mattie, and they didn't want to be bothered trying."