"The Rise and Fall of the Third Reich: A history of Nazi Germany"
by William L. Shirer
I have to say, this book is amazing. I'm on page 30 or so (just got the book and have had to study for finals) but I have loved it. The author puts it all together very nicely, and I would recommend this to anybody that wants to not only learn about Hitler's past (for instance, his last name used to be Schiklgruber [sp?]) and then how he accomplsihed what he did.
World War III? Hm. The best book on this so far is probably like "George Bush, an Autobiography"
My friend read that recently, and highly recommended it. And yeah, WWII :-P
*edits title.
Yeah, your friend is awesome then, iago.