What is the author's style in The Spirit Catches You and You Fall Down by Anne Fadiman?

The author, Anne Fadiman, wrote her novel from the first person perspective. While she is not an integral character, she uses the pronoun "I" often. In doing so, she offers the reader her perspective. For instance, she admits to being ignorant of Hmong culture when she first began investigating Lia's circumstances. She was motivated solely by curiosity.