What is the perspective of the book, A History of the World in 6 Glasses?

A History of the World in Six Glasses by Tom Standage is a non-fiction work told from the perspective of the author who conducted exhaustive research for this book as evidenced by the extensive references and resources he lists in “Notes” and “Resources.” He used the material he gathered in the compilation of this history of the world as seen through the emergence of popular drinks at pivotal times in history.