Europeans going to sea in the fifteenth century and ushering in the Age of Discovery was the result of coming into geographical knowledge of the world inherited from the Chinese, which infers that the Chinese had explored and charted the world’s landmasses before the Europeans. Christopher Columbus went on his ventures with such information in hand. Such are the conclusions arrived at by history researcher/author Chao C. Chien’s lifelong work, the entire thesis of which is presented in this definitive volume. Over 300 illustrations of evidence comprising of extant European historical documents and maps this work challenges orthodox history of the Age of discovery head on.