What is the author's tone in Sugar Changed the World: A Story of Magic, Spice, Slavery, Freedom, and Science by Marc Aronson?

The prologue of the book was written in first person, connecting the reader to the authors. It showed how history touched their own lives. The main part of the book was written in third person, and it read much like a history book. As it moved through history, it showed how each action and event led to other actions and events. The book was interspersed with personal anecdotes and samples of writings from people who were enslaved as well as those who fought against slavery.