威廉·林赛编著的《万里长城百题问答》内容介绍:The Coiling Dragon, the familiar form of the Great Wall of China, has startled millions over recent decades,yet retained its mystery - because so much more of it lies beyond, behind and before. Unknown in its multifarious ages and appearances, unexplained in detail and misunderstood in concept, the Wall's story has hitherto remained unheard, concealed by chaos, denied by distance, strewn in apparent and unassailable disarray across the hostile field of North China's deserts and mountains, even wandering into Mongolia,Russia and North Korea.