What is the author's style in The Harvest by Tomas Rivera?

The story is told by a limited third person narrator, who observes the activities and attitudes of the migrant workers. The narrator knows what is going on in the minds of the youngsters who speculate about Don Trine, but he has no insight into Trine himself, who is seen entirely through the eyes of the boys. This technique is necessary to create the sense of mystery about Trine's activities on which the story depends.