I'm with you. Couldn't put it down, in fact. Read it in about 3 days. And I still use it as a reference -- sometimes reading whole chapters.
My only beef with it is that there is a large swastika on the spine of the book.
Mine's an early edition hardback with the cover long gone, so I have no idea what was on there originally. But the new edition softbacks I've seen in bookstores have the cover/spine design you described.