I just got finished reading "The Man Who Broke into Auschwitz" by Denis Avey. It was one of those books that once you get into it, you have to keep reading. Interestingly, the time he spent in and around Auschwitz was only a small part of the book... What came before and after was just as interesting. My only grievance was that there was a lot of British and military slang; a glossary of terms would have been helpful. Often you had to guess from context what certain words meant.