Gitta Sereny got to know Albert Speer and spent several years in communication with him. Albert Speer was the architect and Armaments Minister for Hitler and the Nazi party. He wrote his own memoir and seemed to be very open and honest, and probably was about a lot of things. I do not think that he was completely honest with his knowledge of certain activities. I think that Gitta did a great job trying to encourage him to confront facts and be honest about them. I have another book by her that was also very good and in depth.