Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This book is quite an achievement

In this quasi encyclopedic book the author brings alive the SS and the men that ran that organization. I did learn more about Himmler's and Heydrich's character in this book than in their respective biographies. This learned effort by Mr. Höhne combines scholarship with anecdotes and historical "trivia". This book will shed light on most readers about the organizational structure, mission and the legacy of horror that the SS left at its wake. Upon reading this book it was impressed on me the importance of checking budding dictatorships at their outset.