What is the author's style in Hitler by Ian Kershaw?

The perspective of the author is highly academic. The author attempts to show the evil of Adolf Hitler by Hitler's action and does a minimal amount of labeling of these actions. The book is in the third person, but has numerous quotes from Hitler and his associates and adversaries placed within the text. These quotes in turn are extensively footnoted with their sources. The book was published in 1976, when numerous associates of Hitler and people of these times were still alive and in many cases interviewed by the author. Several books by people familiar with Hitler are quoted and are particularly useful to the author. These include "The Young Hitler I Knew" by August Kubizek, and Hitler's Secret Conversations, 1941-1945, edited by H.R. Trevor Roper.