This book is extremely well researched. Its what you might expect from a professor. It is better documented than Rise and Fall of the Third Reich that is considered the Bible on the subject but is shorter in length. Some of the intricate details however seem dubious, such as, the reference to the Soviet autopsy report on Hitlers body that states that Hitler had only one testicle. I don't doubt that the Soviets wrote such but there has never been DNA proof that his body was ever identified. As a result of the authors research it does seem to refute the notion that Hitler, in his early years, was a bum with relatively no financial resources compared to others during that period. His book is nevertheless spellbinding for those in search of Why Hitler, the high school dropout, rose to lead a nation with 12 Nobel Prise winners in Berlin and the worlds greatest opera, a nation that was elitist by any standard.