Thought that this would be the right section to bring a new book to peoples attention. The book in question is KL: A History of the Nazi Concentration Camps by Nikolaus Wachsmann (ISBN: 978-0316729673).
As the author states in the introduction, the book is not intended to be THE history of the camps but A history of them due to the sheer scale and complexity of the camps and the information available in various archives.
However, so far I have read 200 (of 880) pages and, in the English language at least, I think this will be THE history of the camps. It begins with the early camps such as Kemna, Esterwagen and B÷rgermoor and explains how some of the earliest camps were no more than cellars (and a tugboat (near Bremen)) and how the Nazi regime clashed with the Judiciary on the excesses being committed to the extent that in the early days the camps were far from being permanent due to Police pressure. In some cases the police removed prisoners from the camps and placed them into prisons, something that saved the lives of some of the inmates. All of this was known to other countries, including the harsh treatments, and numerous newspapers covered the topic. Some senior officers in the camps even published books during that time which sold thousands of copies so they were known about by the German public.
The book covers many aspects of the camps in a total of 11 chapters, from corruption within the system, how the focus turned from the Communist menace to Jews and the ratcheting up of terror and how the camps existed in German society.
Research for the book covered 10 years and it shows and I would say it is a must read for anyone with an interest in the subject. Nikolaus Wachsmann is a European History Professor based in London.