What is the narrator point of view in the novel, The Aguero Sisters?

One of the most complicated and intriguing aspects of Garcia's novel is its shifting perspectives. Although Reina and Constancia are at the heart of the novel, these two protagonists (the central characters who serve as a focus for the themes and incidents of the novel) don't tell their stories in their own voices. Ignacio Agüero has left behind a diary, in which he narrates the events of his life in the first person, telling his own story and offering opinions about the various actions and characters.