This is Gavin Menzies' fourth book I have read. 1421 and 1438 I thought were exceptional efforts bringing order out of the chaos of disparate and fragmentary evidence from many locations which is revealing the exploratory adventures of the Chinese and the probable source of the maps which emerged in fifteenth century Europe. I was disappointed in his Atlantis book with its proposed when and where.The book is divided into 3 parts: part one is a slow read.Part 2, China in the Americas, in particular the antiquity of the Olmecs and their Chinese connection. In the genetic evidence chapter I found the Machado-Joseph disease connection of the Melungion people of southeastern US and Yunnan in China an undeniable example. There are many other examples of their presence.Part III-China's explorations to the north was the most interesting section. The likelihood that a Chinese junk got swept into the great dismal swamp in the early 15th century was intriguing. I was most interested in the "Pacific coast of North America" chapter. In addition to the multiple examples of Chinese influence in the western US, it provided the method by which Chinese land explorers got to our west coast. “Pale Ink” (Henriette Mertz) and “Did Ancient Chinese Explore America?” (Charlotte Harris Rees) describe walking travelogues in North America. And now that I know that Kublai Khan had a "lost" fleet, it seems possible that what Gunnar Thompson described in "Marco Polo's Daughters: asian discovery of the new world" could actually have happened.For those readers who enjoyed Menzies' 1421, this book continues the unveiling of what the Chinese really accomplished so long ago. I recommend the book.