《香格里拉百年回望》作者曾任职于美国大自然保护协会驻云南办公室，在此期间他搜集了大量20世纪20年代探险家洛克在中国西南地区拍摄的历史照片，并在同样的地点用同样的角度进行拍摄，这种历史照片和现实照片的新旧对比给读者带来极强的视觉冲击。（Revisiting Shangri-laThe author ever worked in the Yunnan Office of The Nature Conservancy of America. During that period, he collected a lot of historical photographs taken by the explorer Locke in southwestern China in the 1920s, and shot pictures at the same location and from the same angle.）