The author - a former British submarine commander - uses his knowledge of the world's ocean currents and navigation techniques to investigate the routes Chinese junks might have taken to explore the world. He finds evidence of Chinese trade, and settlement, right around the world - from Antarctica to the Bering Straits. The evidence he produces is compelling - from the existence of Asiatic chickens in the New World before the arrival of Europeans, to Maori oral accounts, to DNA evidence and shipwreck sites. By examining early European writing he makes clear that the early explorers - Diaz, Columbus, da Gama and Magellan, for example, all had existing charts - quite accurate ones too - and knew where they were going! This rivetting read turns our version of history upside down! A fascinating and extremely well researched book. You can find new evidence on the associaited website.