Great book about the escapes from East Berlin to the West achieved by using tunnels dug under the Wall. It is a fascinating look into the earliest days of the Berlin Wall Information the don't teach in school at least not well I was there. It is an incredible look into a period of history that many have ignored, and many more wish would be forgotten. In the NBC documentary you get to see and understand the risks they had to face in not being caught and the emotions they faced each day. I can't even imagine what it was like. A true story no one should forget.