What is the author's perspective in the nonfiction book, The Lost City of Z?

There are two main perspectives in the work: Fawcett's and the author's. The author plays the role of omniscient narrator, adding his commentary while describing Fawcett's past. The author works to parse and make sense of Fawcett's entire life. He objectively builds connections and creates meanings. As a journalist, the author is interested in the perspectives of others, as it helps fill in the missing pieces of a story. He interviews many witnesses and relations to his subject in the hopes of coming closer to a full picture. Unlike other non-fiction works, there is no known conclusion to the tale. Very much like the Royal Geographical Society members who once guessed at what wonders lied within uncharted realms, the author must explore and chart out the mysteries of Colonel Fawcett's life.