I found this book to be incredibly engaging, with a clear focus in mind that is shown by the subsections within the chapters that allows one to leave the book with more knowledge about the horrors of the Nazi police.
Lucas does not assume much previous knowledge, and he manages to depict the war in its entirety through brief mentions that occur in between the information regarding the Gestapo. I was completely engrossed in this, and I really enjoyed how I was able to really focus on a specific aspect of a war that is often so generally painted in history classes.
I would highly recommend this book, not only to history enthusiasts, although they will surely enjoy it, but to just the casual reader. This book, especially the last two pages, makes a point of emphasizing how we should never forget the lengths to which human cruelty can extend, and how we must safeguard against these things, never allowing them to reach the scale they once did.