He served as Hitler's architect, the undisputed master of the German war machine, and the one responsible for conscripted foreign labor in the Third Reich. And, when Albert Speer was captured and sentenced at Nuremberg -- after becoming the only defendant to plead guilty -- he started keeping this secret diary, much of it on toilet paper. After 20 years of imprisonment, he found 25,000 of the smuggled pages waiting for him, and from those entries he shaped this deeply powerful document.